#Portunidae

[uncharismatic-fauna]

At Last, the Atlantic Blue Crab!

A common sight on dinner tables in Canada, America, and Mexico, the blue crab-- also known as the Atlantic blue crab or the Maryland Blue crab (Callinectes sapidus)-- is native to the the Gulf of Mexico and the Atlantic coast of North America. This species is a bottom dweller, and can occupy a range of habitats from freshwater tributaries to the open bays and gulfs of the ocean itself. At times it may be found at high tide, but most individuals remain submerged at depths up to 36 m (120 ft) deep.

As indicated by its name, the claws and front body of male blue crabs are bright blue. Females are carry a blue tinge, but are largely brown or olive, though the tips of their claws are bright red. Otherwise, the two sexes may be distinguished by the shape of their underside, or "apron"; males have an inverted 'T' shape, while females have a wider, rounder shape. Individuals of both sexes may grow up to 23 cm (9 in) in width, and weigh up to 136 g (0.3 lbs).

Spawning for C. sapidus can occur year-round, but for most populations it peaks in October or November. When females are ready, they travel up estuaries and rivers to where populations of males are more concentrated, and then release pheromones in their urine to attract mates. Male crabs then compete for access, and guard their chosen mates fiercely for up to a week. During this time, the female molts, at which point the male fertilizes her. Afterwards, she may retain her mate's sperm for up to a year, during which time she returns to saltier waters. A female can fertilize 2 million eggs at a time, and will carry them in a mass under her abdomen until they hatch, about a week after fertilization. She may do this as many as 4 times throughout a single mating season.

Once hatched, Atlantic blue crab larvae are released into the ocean. Each larvae spends 30-40 days going through seven larval stages known as zoea; these stages are similar to the instars of a larval insect. However, zoea have hard shells and must molt at each stage of development. After the initial zoea stages, juvenile C. sapidus enter the megalops stage, which lasts 6-20 days. During this time juveniles move from the ocean into the estuaries in which they spawned. Finally, they molt into their final form, which resembles an adult-- albeit much smaller. Both males and females continue to molt throughout the year until they reach their full size. In total, both sexes go through about 25 molts each throughout their lives, which spans about 3 years in the wild.

Blue crabs have a wide and varied diet, as they are omnivores. In their larval stages, Maryland blue crabs consume primarily plankton and detritus. Megalops and adults will feed on clams, mussels, and oysters, small fish, kelp, seaweed, carrion, smaller blue crabs, and animal waste. In turn, both juveniles and adults are food for eels, large fish some sharks, stingrays, and humans. In fact, predation upon larval and sub-adult blue crabs is so heavy that, of 8 million eggs released by the mother, only 1 or 2 typically survive to adulthood.

Conservation status: The Maryland blue crab has not been evaluated by the IUCN. However, in recent decades, fisheries have noticed a severe decline in abundance, likely due to over-harvesting and pollution.

If you send me proof that you’ve made a donation to UNRWA or another fund benefiting Palestinians– including esim donations and verified gofundmes– I’ll make art of any animal of your choosing.

Photos

Kim Cover

Lynn Strauss

Jo O'Keefe

#atlantic blue crab #Decapoda #Portunidae #swimming crabs #crabs #decapods #crustaceans #arthropods #marine fauna #marine arthropods #coasts #coastal arthropods #atlantic ocean

[rattyexplores]

Photos 1-2 - Carapace, washed up 10-15m away from body

Photos 3-4 - the rest of the body

Photos 5-6 - closeups of claws

Photo 7 - flattened hind leg / Photo 8 - the other legs

Photo 9 - closeup of carapace / Photo 10 - internal structure beneath carapace

Dead crab that washed ashore. The carapace had detached from the rest of the body and washed up separately, but its still a clear match in my eyes.

You can see how its last legs are modified (or flattened I guess) for swimming.

17/09/23 - Portunus sp.

QLD:WET - Cardwell, ocean shore

#Arthropods #invertebrates #invertblr #arthropod #arthropoda #Portunus #unidentified #Portunidae #Swimming Crabs #Decapoda #Decapods #crabs #dead tw #Crustacea #Crustaceans

[drhoz]

#2013 - Portunus armatus - Australian Blue Swimmer Crab

Photo by Patrick Wake

AKA Blue manna, Blueys, and Jennies (for females). Formerly part of Portunus pelagicus, until DNA evidence and close anatomical study split that genus into four species. It might not be blue, and it's missing the most distinctive part of the anatomy, but it's definitely a Blue Swimmer.

This is the fifth leg, flattened into a paddle. They can swim quite well for a crab, which combined with their aggression can lead to alarming encounters with you're swimming or wading in the same ocean.

Blue Swimmers are an important recreational fishery in Australia, and populations are generally healthy, but have collapsed where overfishing is combined with pollution.

They live in estuarine and marine waters from theintertidal down to 50 m depth, moving to deeper water in winter, or out to sea when fresh water enters estuaries. They prefer areas with flat muddy or sandy bottoms with seagrass or algae where they can hunt small fish and other crustaceans, molluscs, and worms, and supplement the diet with algae and seagrass. They reach maturity in one year, and after three years may have an 80cm claw span.

#portunidae #swimmer crab #australian crustacean #crab #cooleenup island #portunus

[ifelten]

Almindelig strandkrabbe (Carcinus maenas)

Green Shore Crab (Carcinus maenas)

#Almindelig strandkrabbe #Carcinus maenas #Carcinus #Green Shore Crab #Krabbe #Crab #Portunidae #Sommer #Summer #Nibe Havn #Limfjorden

[2t2r]

l'étonnante vitesse de la nage d'un crabe [video]

Nouvel article publié sur https://www.2tout2rien.fr/letonnante-vitesse-de-la-nage-dun-crabe-video/

l'étonnante vitesse de la nage d'un crabe [video]

#Callinectes sapidus #crabe #nage #nageur #nageuse #natation #Portunidae #vidéo #animaux #imxok

[daikatanaman]

Today was the day i finally started researching for science... i think.

I had to identify each species that my advisor managed to find on a beach.

They were collected in a beach which had rocks, on low tide, so some of the species collected were actually common from reefs.

I went from the crabs first, because I thought they were the easiest ones to identify... boy i was wrong, just the brachyura identification of the coast of brazil had basically 800 pages, but this big one here was actually easier to id, because, for one, because of the slippers on their backs, they are surely what the brazilians call a "siri", so from the family Portunidae, to get the actual genre and species was a little bit tricky, basically, the males from the genre Callinectes have their telson in a T form (the book is very vague about what the hell is a T, but its their telson), you had to see little spikes they have around the eyes to determine the species, its probably a Callinectes danae

its not their penice s btw,,,

these are pistol shrimps, one of them had eggs with them, i'll have to study some Alpheidae (pistol shrimp superfamily) identifications so i can ID these ones.

The other ones were 2 Carcinus maenas and a bunch of Clibanarius crabs, that i won't show cuz they're pretty gory, because they were stuck in their shells and i had nothing to break the shells, so i had to yank them out (worst part of doing ids with crustaceans).

also was a pain in the ass to look cleary throught the lenses of the macroscope, so i made a sketch based on what happened

thats it....

#tw dead animal #tw dead crustacean #science #marine biology #carcinology #pistol shrimp #blue crab

[grosirikanlaut]

KEPITING RAJUNGAN

Rajungan adalah nama sekelompok kepiting dari beberapa genus anggota famili Portunidae. Kata ini diambil dari bahasa Jawa rajungan. Jenis-jenis kepiting ini dapat berenang dan sepenuhnya hidup di laut.

Yuk, makan ikan agar tubuh kuat dan sehat! THE SUNFISH menyediakan hasil laut dengan KUALITAS TERBAIK HARGA TERBAIK dan terjaga KESEGARAN NYA!!

Kamu bisa dapatkan Kepiting Rajungan yang pasti terjamin kesegarannya dengan harga terjangkau. yang pastinya beli di THE SUNFISH GROSIR IKAN LAUT dongg!!

GROSIR IKAN LAUT TEMANGGUNG Jl. Jampirejo Timur Rt. 04 Rw. 06 Kelurahan Jampirejo Kec. Temanggung Kab. Temanggung (Dekat TK Masyitoh Jampirejo, 50 meter dari Masjid Al Huda Jampirejo)

KLIK https//wa.me/628994648716,

Menyediakan: Sedia berbagai Ikan Segar, Hasil Laut dan Air Tawar : Ikan : Kakap Merah , Bawal Putih , Teri Nasi , Salmon, Dori ,Tuna, Udang : Lobster, Udang Laut, Udang Vanamae Kepiting : Kepiting Bakau, Rajungan Kerang : Kerang bamboo, kerang hijau, kerang dara bulu, kerang dara jahe Olahan : Bakso Ikan, Bakso Udang, Bakso Kepiting, Fillet Ikan, Nugget Ikan Gilingan : Gilingan Tengiri, Gilingan Tunul/Baracuda, Gilingan Mahi-mahi

Melayani Grosir dan Retail/eceran PELUANG USAHA KEMITRAAN Seafood booth, frozenfood, supplier dan distributor

Fast Respon PELUANG USAHA 08994648716 IG https://www.instagram.com/thesunfish_grosirikanlaut/ FB https://www.facebook.com/profile.php?id=100094495374590 TIK TOK https://www.tiktok.com/@thesunfishgrosirikanlaut

ikanlaut #ikanlautsegar #ikanlauthias #ikanlautmurah #ikanlautjogja #ikanlautasampedas #ikanlautasin #ikanlautasliindonesia #ikanlautalexis #ikanlautasammanis

[agenikanlautthesunfish]

Kepiting bakau telur

Kepiting bakau adalah sejenis kepiting yang hidup di ekosistem hutan bakau dan estuaria, anggota suku Portunidae. Kepiting yang mempunyai nilai ekonomis penting ini didapati di pantai-pantai pesisir Afrika, Asia dan Australia. Yuk, makan seafood/ikan agar tubuh kuat dan sehat! @thesunfishgrosirikanlaut menyediakan hasil laut dengan KUALITAS TERBAIK HARGA TERBAIK dan terjaga KESEGARAN NYA!!

GROSIR IKAN LAUT TEMANGGUNG. Jl. Jampirejo Timur Rt. 04 Rw 06 Kelurahan Jampirejo Kec. Temanggung Kab. Temanggung (Dekat TK Masyitoh Jampirejo, 50 meter dari Masjid Al Huda Jampirejo)

KLIK https//wa.me/628994648716,

Menyediakan: Sedia berbagai Ikan Segar, Hasil Laut dan Air Tawar : Ikan : Kakap Merah , Bawal Putih , Teri Nasi , Salmon, Dori ,Tuna, Udang : Lobster, Udang Laut, Udang Vanamae Kepiting : Kepiting Bakau, Rajungan Kerang : Kerang bamboo, kerang hijau, kerang dara bulu, kerang dara jahe Olahan : Bakso Ikan, Bakso Udang, Bakso Kepiting, Fillet Ikan, Nugget Ikan Gilingan : Gilingan Tengiri, Gilingan Tunul/Baracuda, Gilingan Mahi-mahi

Melayani Grosir dan Retail/eceran PELUANG USAHA KEMITRAAN Seafood booth, frozenfood, supplier dan distributor

Fast Respon PELUANG USAHA 08994648716 IG https://www.instagram.com/thesunfish_grosirikanlaut/ FB https://www.facebook.com/profile.php?id=100094495374590 TIK TOK https://www.tiktok.com/@thesunfishgrosirikanlaut

#ikanlaut#ikanlautsegar#ikanlauthias#ikanlautmurah#ikanlautjogja#ikanlautasampedas#ikanlautasin#ikanlautasliindonesia#ikanlautalexis#ikanlautasammanis

[fedosiholu]

Mud crab hatchery pdf

 MUD CRAB HATCHERY PDF >>Download (Telecharger) vk.cc/c7jKeU

  MUD CRAB HATCHERY PDF >> Lire en ligne bit.do/fSmfG

           This research project is aimed at evaluating the impact of climate change on the growing mud crab (Scylla serrata) fisheries industry in Tanzania. [The growth of hatchery produced Portunus pelagicus crabs was monitored under after molting of the immature orange mud crab, Scylla olivacea, (Herbst,de C NOUMEA · 1990 · Cité 16fois — culture pour déclencher la ponte chez les crustacés (DEMEUSY et VEIL- of the mud crab Scylla serrata (Forskal) (Decapoda: Portunidae). This research project is aimed at evaluating the impact of climate change on the growing mud crab (Scylla serrata) fisheries industry in Tanzania. de NTB Ngoc · 2014 · Cité 1fois — Commercial mud crab Scylla Serrata : Study on growth, energy and protein requirement of juveniles in the view to develop peleted feed for 20 févr. 2022 — Examples of Mud crap Types of Mud crabs The life cycle of mud crab. 160_IPSITA SAHOO_THESIS (1).pdf. Santosh Kumar Sahoo. de NTB Ngoc · 2014 · Cité 1fois — Commercial mud crab Scylla Serrata : Study on growth, energy and protein requirement of juveniles in the view to develop peleted feed for crab farming in Box Mud Vertical Farming Pdf Culture in Boxes Crab Farm System Z.K.AQUA a été porté à l'inductry de matériel d'aquaculture pour plus de 10 ans.

https://www.tumblr.com/fedosiholu/697666713921224704/how-to-link-a-pdf-file-in-excel, https://www.tumblr.com/fedosiholu/697666568553988096/water-measurement-units-pdf, https://www.tumblr.com/fedosiholu/697666713921224704/how-to-link-a-pdf-file-in-excel, https://www.tumblr.com/fedosiholu/697666713921224704/how-to-link-a-pdf-file-in-excel, https://www.tumblr.com/fedosiholu/697666713921224704/how-to-link-a-pdf-file-in-excel.

[wonder-rooms]

Flower Crab (Portunus pelagicus), Dictionnaire Universel D'histoire Naturelle (1892) - Charles Dessalines D’Orbigny

#Wonder Rooms #Cabinet of Curiosities #Public Domain #19th Century #Charles Dessalines D’ Orbigny #Dictionnaire Universel D'histoire Naturelle #Scientific Illustration #Natural History #Zoology #Animalia #Arthropoda #Crustacea #Malacostraca #Decapoda #Portunidae #Marine Biology

[mybisgovmy]

Portunus sanguinolentus, which is also known as Three Spot Swimming Crab. Photo by Nurliyana Binti Mohammad. #Crustaceans

#Portunidae #MyBIS #Biodiversity #Malaysia #crab #crustaceans

[assigned-k9]

ISOPODS WHAT FUNKY LITTLE (AND SOMETIMES BIG) GUYS they go skitter skitter and i am delighted fo see them always

marine life is VERY SPECIAL i love it very much very much

I LOVE LARGE ISOPODS!!!!!! So special dude, so special… God i love em. Here’s my favourite gif of all time. How is this cr. Truly a remarkable creature never seen before :D [Fact, it’s a portunidae, which is a family of swimming crabs :D Look at em go!]

#RD Rambles #RD Answers

[rattyexplores]

Not many people seem to know this, but crabs can swimming. Here's one I spotted at the Jetty.

17/09/23 - Portunidae sp.

QLD:WET - Cardwell, town jetty

#Arthropods #invertebrates #invertblr #arthropod #arthropoda #Portunidae #unidentified #Swimming Crabs #Decapoda #Decapods #Crustacea #Crustaceans #crabs #gifs

[drhoz]

Cooleenup Island Species List 2023 -Crustacea

June 9th to 11th

12C-18.5C, 2.4mm-12.5mm rain, strong wind on Sunday

Laevophiloscia sp. Woodlouse (Philosciidae) 

Burrowing Shore Crab Leptograpsodes octodentatus (Leptograpsodidae)

Australian Blue Swimmer Crab Portunus armatus (Portunidae)Haswell's Crab Helograpsus haswellianus (Varunidae)

#australian crustacea #cooleenup island

[libanoworld]

Todo siri é, na verdade, também um caranguejo. A explicação é simples: siri não passa de um nome popular dado aos membros da Portunidae, uma das várias famílias de caranguejos.

#natureza #planteumaarvore #bonspensamentos #amigos #bahia #caranguejo #mar #life #vida #ocean #oceano

[thebrackishtank]

Do Blue Crabs Eat Mud Crabs?

If Blue Crabs (Callinectes sapidus) and Mud Crabs (Scylla spp.) are kept in the same aquarium, I all but guarantee you that somebody is going to get eaten.

The Swimming Crabs (family Portunidae), in my experience, are typically very aggressive and very predatory. They eat whatever tank mates they can overpower and catch, usually at night. Even with two “evenly matched” crabs, one or both are likely to be injured and the risk is even greater at molting time.

If you want to keep a large crustacean (and honestly I’ve toyed with the idea myself!) then your best bet is to keep one singly. Alternatively, look into species that are known to live together peacefully, like the Fiddlers.