#Lamnid

[paleopalsfacts]

Give me as much information about the super epic shark Megalodon as much as you can I need it for school for real!!!

Megalodon Facts!

Hi and thanks for your question!  megalodon is pretty well known but here are some more obscure facts I found that will hopefully help!

Megalodon teeth were used by a variety of pre-contact cultures in North America.  It is thought that they were valued artifacts and/or that they were modified to be used as weapons.  Megladon teeth were mined from Chesapeake Bay and traded with other cultures nearby.

Megalodons used to be classified in the same genus as Great white sharks (Carcharodon) because of the similarities between their teeth.  The current model is that Megalodon belongs to the Otodus genus and the similarities between its teeth and Great white sharks is a case of convergent evolution making them appear similar.  They (megalodons and great white sharks) would still probably look somewhat similar based on how we have interpreted other ancient sharks and their similarity with modern lamnids such as great white sharks.

They were also widely distributed, with fossils being found all over the world.  Based on where we have found megalodon teeth we can infer its tolerance of environmental temperatures is between 1-24 C (34-75 F).  They where probably able to handle such cold temperatures because they were mesotherms.  That is when an animal isn't quite an endotherm (able to create our own heat) but isn't an ectotherm (can't regulate their body temperature like most snakes for example).  They had the ability to affect their body temperature via their metabolism but when the temperature in the environment is decreased their body temperature will also decrease.  It is also thought that as body size increases in mesotherm animals there body temperature increases because of the square cube law.  It is hypothesized that one of the reasons megalodon was so large. (you can read more in the article cited below). 

Also megalodons have gone extinct no matter what the discovery channel says

Hope this helps!!

Sources bellow:

-------------------------------------------------------

papers:

Lowery, Darrin, et al. “INTEGRATED GEOLOGY, PALEONTOLOGY, AND ARCHAEOLOGY: NATIVE AMERICAN USE OF FOSSIL SHARK TEETH IN THE CHESAPEAKE BAY REGION.” Archaeology of Eastern North America, vol. 39, 2011, pp. 93–108. JSTOR, http://www.jstor.org/stable/23265116. Accessed 27 Feb. 2024.

Farrell, A. D. (A. D. ). A Use-Wear And Functional Analysis Of Precontact Shark Teeth Assemblages From Florida. no date. Florida State University, 2021.

Ferrón, Humberto G. “Regional endothermy as a trigger for gigantism in some extinct macropredatory sharks.” PloS one vol. 12,9 e0185185. 22 Sep. 2017, doi:10.1371/journal.pone.0185185

links:

#paleontology #megalodon #shark #answered

[sharkbitesteve]

Rough Crossing

A3 private commission requested as a birthday present - also sort of fan art for the opening scene of Prehistoric Planet but replacing the mosasaur with lamnid sharks. Water's also a bit more choppy...

Mixed media on blue paper

#steve white art #art #traditional art #traditional drawing #paleoart #private commission #dinosaurs #shark #palaeoblr

[typhlonectes]

The Warm-blooded Opah (AKA "Moonfish") 

Opah: The Warmest Fish in the Cold Blue Sealabriform lone wolf and marathoner of the mesopelagic

The ocean is chock-full of athletic speedsters zooming around the depths in search of their next meal. Nature documentaries are full of epic footage featuring marlin, tuna, sharks, and other famous species streaking through the water to demolish some poor school of anchovies or herring. But athleticism in the marine environment comes in all sorts of unique shapes and sizes—and no fish exemplifies this better than the elusive and unmistakable opah!

Opah, or moonfish, have some similarities to a group of fish we’ve previously covered—molas, or ocean sunfish.

Opah are comprised of six known species in the genus Lampris. Opah and molas also share a similarly deep-bodied and round body shape. Both groups of fish are also far more athletic than their somewhat odd shape might suggest—opah are known to keep pace with tuna and other highly mobile predators during their forays throughout the mesopelagic zone, usually sticking within about 150-500 feet deep. 

And finally, both opah and molas utilize somewhat abnormal swimming methods. While molas wag their oversized dorsal and ventral fins to move forward, opah flap their pectoral fins to fly through the water in what’s known as a “labriform” swimming method.  Though opah larvae are quite long and slender when hatched, they quickly grow into their distinctive deep-bodied form before they’re an inch long...

The distinct appearance of opah belies their truly unique biology. 

A rare few fish like tunas, billfish, and lamnid sharks can regulate the internal temperature of certain critical portions of their bodies. Opah take it one step further: they have the distinction of being the only known fish to possess whole-body endothermy, allowing them to maintain internal temperatures higher than the surrounding water throughout their entire body. In addition to their unique whole-body warming, they keep their eyes and brain even warmer...

Read more and hear the USFWS Fish of the Week podcast here:

https://www.fws.gov/story/opah-warmest-fish-cold-blue-sea

Photograph: Ralph Pace/NOAA Fisheries

#opah #moonfish #ichthyology #science #ocean #animals

[anryuuepic]

Do the people look like lizard folk from dnd or is it more humanoid?

Also since they are reptilian do they have specific places for sun bathing/warming up? Like have they made up for some of their needs in their architecture?

(This all sounds super cool omg i might have to deep dive this blog)

The alternate forms commonly used by Anryuu look more or less "human", yep! Their ability to shapeshift develops early in their youth, and they end up spending most of their time in their secondary forms as a matter of convenience, social decency, etc.

However, there are some indications of species that stand out even in an Anryuu's secondary form: Dzlethians retain the horns on their head, Ghiasuli have pointed ears, and Giants (a theorized sub-species/relative of the Dzlethians) have both the horns on their head and a second pair located near the lateral end of the clavicle.

As for body temperature, Anryuu are likely mesotherms! This category includes lamnid sharks and leatherback sea turtles, which generate sufficient body heat through body size/surface-volume ratio and/or muscle activity to not be truly "cold-blooded". So nope, they do not need sunbathing accommodations. (Disclaimer: I may change this idea as I do more research on the subject.)

#Biology #Daryan #Dzlethian #Ghiasuli #Giants

[girinma]

YAAAAY press releases are out so I can say I got to see a great white shark necropsy yesterday!!!! poor girl was stranded in myrtle beach so they brought her in to figure out what killed her since. thats not a normal thing that happens.

sooo cool!! never saw a white shark before… just like the children’s book I had where each page had part of a 3d model of a great white shark’s anatomy…

tw for blood/gore/animal death under the cut because pics. it’s a dissection.

where's waldo game from this pic i stole from a news site. guess which one is meeee (im in the red. there's no way to guess this i dont post that many pics of myself).

also ideal working conditions. 5 people laboring and the rest of us spectating.

lighting is bad but you can see her better here. most of her organs had been removed at this point (the trays up front have her liver). wild that despite her being ten feet when i came out to see her i didn't know she was a juvenile so i walk outside and im like. oh she kinda small. also had never seen shark vertebrae before and its wild how chunky the look despite being cartilage? also not very smelly? apparently lamnids dont have as strong of an ammonia smell.

#i have so many bug bites now from standing outside to watch but it was worth it #irl gore #animal death #blood

[encyclopika]

Animal Crossing Fish - Explained #200

Brought to you by a marine biologist and...holy hell, 200?!!

CLICK HERE FOR THE AC FISH EXPLAINED MASTERPOST!

Well, I’d like to commemorate this momentous occasion by covering a really interesting creature that was featured in AC Pocket Camp and that is the Opah. I’m a little biased here because I just love weird fish, especially deep sea species we don’t really know a lot about. It’s about the mystery. So, I’ll do my best to cover this amazing thing. If you want to know why we don’t have a lot of information into deep sea fish, check out my coverage of ACNH’s museum tour of the deep sea tank.

The Opah appeared in AC Pocket Camp for Fishing Tourney 40, which occurred in July 2021. Like I mentioned in the last entry, it appears that ACPC is less concerned with the actual temperature range or habitat of the fish it chooses for what events. The Opah is considered a deep-sea species, or at least an open ocean species that just doesn’t come close to land. It often lives at depths where the water temperature is around 4º C (about 39º F), which is, ya know, not a balmy summer temperature. Although Opahs as a group have a cosmopolitan distribution (aka they are found all around the world, including tropical areas) they tend to stay deep where the water is cool and sunlight can’t reach.

Anyway, the Opah is a pretty unique fish. It belongs to the Order Lampriformes, a small group of fish that include mostly deep-sea and pelagic species. The Order’s name comes from the Opah’s round shape and brilliantly-colored fins and skin, though most Lamprids are more long and slender, with most fish in the Order belonging to the “ribbonfish” clade, for which the infamous Oarfish is a part. That being said, Opahs exist apart from their cousins in the Lampridae family, which only houses one Genus, Lampris. For much of the time we’ve known that Opahs existed, we accepted that there were two species within this Genus. However, in recent years, Lampris guttatus, the comsopolitan species, has been broken up so that there are now six species with more limited ranges. As I’m sure AC Pocket Camp wouldn’t recognize this, not to mention the study occurred in 2018 after ACPC was released, I’m pretty confident this is simply Lampris guttatus, or the (original) Opah. 

Ralph Pace (NOAA Fisheries), Public domain, via Wikimedia Commons

So, despite the fact they look a bit goofy and fat, these fish are actually really fast and exhibit endothermy, or warm-bloodedness. In fact, the Opah is the only fish we’ve discovered so far that has whole-body endothermy, in which all of its internal organs and muscles are kept at temperatures higher than the surrounding water. (Please note, this is still unlike birds and mammals that keep their warmth at a constant temperature - the Opah’s body temp still fluctuates.)  On top of that, Opah also exhibit regional endothermy, or the act of keeping some parts of the body warmer than others. This type of endothermy is more akin to billfish, tuna, and lamnid sharks (like the great white, porbeagle, salmon, and makos). This type of endothermy usually keeps the eyes, brain, and swimming muscles at an elevated temperature which helps these fish remain active hunters in colder waters. So, unlike most deep-sea fish, the Opah doesn’t just float around in the dark waiting for prey to come to it - it has the power and energy to seek out and chase down its food, which often includes squid and smaller fish.

And there you have it. Fascinating stuff, no?

#opah #deep sea #marine biology #animal crossing #animal crossing pocket camp #acpc #science in video games #animal crossing fish explained

[albertonykus]

Do carcharodontosaurids actually have lamnid-like teeth?

Well, carcharodontosaurids and lamnids both have teeth that are sharp, serrated, and compressed in one plane, and there’s at least one lamnid species with slightly recurved teeth. I’ve certainly seen parallels drawn between organisms for far less.

[huxley-paleozoo]

Question a out Megalodons. Recently I've learned that its possible they more likely had body plans similar to Whale or Basking sharks then that of a White sharks due to different niches and the difference in size. Thoughts on that?

That restoration is based off of the assumption that the size of an animal has a greater effect on its morphology than niche. While this is true for terrestrial animals for the most part, aquatic animals are a different story. You can scale up an animal and it would be able to function similarly to its smaller form, though there are obvious differences. Blue whales don’t have extremely large flukes proportional to their bodies. and basking sharks don’t have proportions that different from lamnids so using a whale shark for restorations of a megatooth is definitely not advised. Animals of a certain size will generally converge on a lamnid-esque shape and as such white sharks are a perfectly fine base for the bauplan of C. megalodon 

Phylogeny and niche are a far greater impact on the appearance of an aquatic animal, especially sharks.

Whale sharks and basking sharks are both slow swimming filter feeders, so their lives are drastically different from that of a megatooth, who I remind you was more ecologically similar to white shark just scaled up. 

- Kim Sang-eo

#megalodon #Anonymous

[franeridart]

Hello I love your art and love the new kiribaku kids. I did research on mako sharks and it said "The shortfin mako is on record as the fastest-swimming shark, capable of bursts of speed up to 18.8 metres per second (42 mph)." Its jaw is powerful enough to eat swordfish and sea turtles. And "Like other lamnid sharks, the shortfin mako shark has a heat-exchange circulatory system that allows the shark to be 7-10 °F warmer than the surrounding water. ". So I think mako would be an excellent hero

Never said she won’t be! As I’ve already explained tho the concept is that she’s young and most of he quirk-related abilities just haven’t developed yet - if she’d been living with her biological parents (which means, other people with a shark quirk) they would have already known what to expect from the quirk/she would have knows watching them, but as things stand she’s being raised by two people who’ve never known anyone else with that quirk, so they’re going at it completely blind. As far as Bakugou and Kirishima know her quirk’s abilities could stop at what she has now, but that doesn’t change that they’ll do their best to help her become the best hero of her generation, if that’s what she wants

Anon said: I can't believe the KiriBaku kids are literally Sharkgirl and Lavaboy, it's very cute. I also wanna say that Mako looks very much like one of the student from Ketsubutsu Academy, Nakagame Tatami, who has a "turtle quirk". Could it be that Mako is Tatami's biological kid and that when Tatami died (presumably from battle) Mako got adopted? Their quirks are a little similar (water-animal based), and hero's kids usually have very strong quirks even from a young age. Just a theory, love the kids tho!

I know you didn’t mean anything bad by this and I love how into them you are (thank you for liking them!) but please never, ever tell an artist that their OCs are literally some other characters, that’s the worst thing any creator can ever be told. Like, while I don’t exactly mind it since I knew this would happen even before posting them (as I said, I do know they remind of them - even though Tai’s quirk isn’t only about heating things up - and I’m still of the opinion that Kiri and Baku are pretty damn similar to Sharkboy and Lavagirl themselves so kids inspired by them were bound to remind of them, when coming from me) you might in the future find someone who’ll take it bad enough that they’ll just trash the characters and never work with them ever again, which I’m sure you don’t want

Just, mind your words next time you send this sort of asks, okay?

Anon said:(Hi, I'm the one who liked sharks and thought about mako's quirk too much) honestly some things she might do: be able to move/unhinge her upper jaw, have weirdly made bones because cartilage, absolutely terrify her parents by growing in her baby teeth and then immediately LOSING THEM w a second row ready, literally never get sick, heal faster than average

Her bones are normal human bones but everything else works for me! Tho as far as her baby teeth go Baku and Kiri hadn’t adopted her yet, back then haha

Anon said: here's a question, can mako talk underwater? i think tsuyu can so it doesn't seem unreasonable (don't quote me on that tho)

She can’t! For two main reasons: the first, she uses gills to breathe underwater - at the sides of her ribcage - which means that there’s no air passing across her throat to make her vocal cords vibrate to produce sound. Technically she could probably find a way to switch between breathing systems just enough to make herself able to talk, but it requires a type of coordination she still doesn’t have. She tried, nearly drowned herself, Kirishima freaked the fuck out and forbid her to try again at least until she’s ten; the second reason is that as far as I get it sharks don’t actually make noises underwater, which is why she can’t naturally talk while submerged and needs to switch between breathing systems for it to work~

Anon said:I think u never answered anything ab that so... what are/were your feelings on fat calling Kiri "chickling" when he found him under his belly?

Still unsure whether he actually called him chickling or if FA was right and the correct translation is “what are you, a chickling”, but either way it was adorable and I died a lot I’m so glad Kiri has Fat in his life ;A;

Anon said:Okay so I recently like two days ago recent found some of your Kiribaku art work and thought it was really cute so then I delved deeper and got into the characters and stuff but I thought that Bakugou controlled fire or something like he could heat up his body and stuff and now I really love this idea but it's now actually cannon and I don't want to make an au or anything but I thought you'd like to hear about human heater Bakugou who gives really warm hugs and cuddles to Kirishima- :)

I hc Bakugou as having an average temperature higher than normal because of his quirk, so this still works for me! It’s so soft and good, thank you for sharing it!!! ;u;

Anon said:I ship Tsuyu with Mina but it always low key feels like I'm alone in this :/

It’s not my fav ship for either but I do ship it too!!! They’re so nice tbh and they’re two of my fav girls in bnha so that’s an A++++ concept for me - and I’m sure you’re not alone!!! I’m pretty sure I read more than a fic with that ship as a bg one, so there must be people who main it too~

Anon said:Your BakuKiriKami art has me obsessed with these boys and convinced me to read the manga instead of just watching the anime! I just got to the hero license exam and the first thing I thought of when I saw Kaminari was "omg his boyfriends must find his updated costume so hot" because now I have a one track mind for this OT3 😂

LMAO that’s good and that arc is such a great thing for the ship too~ it was definitely the moment I started seriously shipping it!

Anon said:have you ever thought about doing a web comic?

Yeh! I haven’t stopped thinking about it since I found out webcomics were a thing lmao

Anon said:Hmm... would BakuKiriKami ever have kids, I wonder?

Are you asking me what kid they’d have or generally if they would because if it’s the second then sure - I really can’t see Kaminari and Kirishima never wanting kids tbh, and if it were with people he loves I think Bakugou would want a family too, probs

#fran answers #sorry about the tone in that second answer #but that's seriously a problem guys #not /specifically/ for me cause I sorta do whatever #it's not like I want to work all that much more with those kids they were just random doods #but I HAVE seen people talk about dropping ocs/ideas because of the comparisions #and i don't like that one bit #not every character can be unique #if you look for it you're gonna find someone that reminds you of them it's just how it works #but just taking the general concept and going THAT'S LITERALLY THIS OTHER CHARACTER #can mess artists up a lot #don't do that #mostly so if you mean it as a compliment that's NEVER taken as a compliment #anonymous

[techmomma]

“Aye, I heard o’ Cap’n Black Eddy, the scoundrel. Dogged them privateers and bluejackets fer ages, he did, sinkin’ Canid warships ‘n Lamnidian frigates, makin’ off with his spoils. Heard he used be one o’em too, till he turned heel. Never did catch the old cur--good on’im, I says. ‘Least one o’ us old pirates got away. 

“Clever old twidget he was. Never wanted him aboard yer ship. Had a way with’em--heard a touch could render a ship dead in the water. Could board a merchant’s vessel ‘n know it like his own mother, way he moved around. Like the ship were his bonnie baby. Not even the devil hisself coulda caught him, no doubt.

“Fearsome gale, the man was--and a right proper cap’n, always took care o’ his crew. Seems almost a shame him and them went up and vanished inta the rollin’ Etherium. I tells you, we get a cap’n like him? No blasted navy, Procyon ‘r Felid ‘r Lamnid ‘r nuthin’, would stand up ta us.”

#etheriumAU #tech

[oneoceandiving]

Many sharks are cold-blooded, meaning their body temperature is consistent with the water temperature. Humans are warm blooded since we generally maintain a temperature that is higher than the environment. Some sharks though are an exception! Lamnid sharks include the white, porbeagle, mako and salmon sharks, and these are actually endotherms (Carlson et al., 2004)! The lamnid sharks are able to preserve their metabolic heat through vascular counter current heat exchangers so that their body temp is higher than the water temp (Carlson et al., 2004). The counter-current heat exchangers retain heat that would have been lost when blood is oxygenated at the gill lamellae (Goldman, 1997). This generally causes them to have a higher metabolic rate compared to other shark species. White sharks benefit from this in that they can still hunt in cold temperatures and have a burst of speed that relies on a generation of heat. Lamnid sharks also have retia, which is an arrangement of vessels that warm the eyes and brain of the shark (Helfman et al., 1997). This has the potential of helping the shark see prey movement (Brill et al., 2005). Thresher sharks, belonging to the Alopiidae family, also have retia! Photo by: @juansharks Post by: @nikitapatel_23

[huxley-paleozoo]

I have a tiny question in regards to your Megalodon: What are you folks planning to do with it when it grows up? Will it have to be separated from it's C. augustidens or could they still live peacefully?

We have plans to open up the sea pen once she grows too large for her current pen. We will not separate the C. angustidens from the C.megalodon due to these lamnids being social animals and even traveling in “clans” in modern species of lamnids. once finished the sea pen will be among our largest exhibits being at least 10 million gallons of water. remember that the animal will be 10-20m long when full grown and as such we will change the pen to fit her size as she grows.

--Kim Sang-Eo