imitationcrabs
Crabs And Other Critters
Crabs and crab adjacent creatures. They are our friends
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Last Seen Blogs
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Smootheez crab by Mary Meyer
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Hard plastic crab with jiggly rubber limbs
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~ Crab Vessel with Double Spout.
Place of origin: Colombia, Calima Region
Period: Ilama Period
Date: 1500 B.C.-A.D. 100
Medium: Ceramics
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Yashima Gakutei, Crabs Near the Water's Edge, ca. 1830
Vincent van Gogh, A Crab on its Back, Paris, August-September, 1887
Vincent van Gogh, Two Crabs, 1889
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Ocean In My Pocket Crab Family 5 Pc Set
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This is an Australian sponge crab. I can’t
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her name is Vintage Murano Mouth Blown Art Glass Crab Figurine Paperweight and she is 9" Wide
[source]
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Red crab by slumberkins
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The Merry Melodies cartoon "Greetings, Bait" about a worm vs. a crab did SUCH an imaginative abstract gag here that really only works with a stalk-eyed character design. It's too bad they never used the crab in anything else.
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Lamarckdromia beagle: these crabs wear living sea sponges as protective "hats;" after selecting a sponge, the crab trims it, drapes the tailored sponge across its carapace, and then carries it around
Last year, a newly-classified species (referred to as Lamarckdromia beagle) was discovered off the coast of Western Australia. Like all other members of the genus Lamarckdromia, this species is part of the Dromiidae family, which contains many different types of crabs that are known to use living sea sponges and ascidians to protect themselves from predators. These crabs are often collectively referred to as "sponge crabs."
Lamarckdromia beagle: this new species is covered in a dense, shaggy layer of "fur," which is actually made up of hair-like structures called setae
According to this article from The Guardian:
Dr. Andrew Hosie, a curator of crustacea and worms at the Western Australian Museum, said sponge crabs had hind legs that were specially adapted for holding their protective hats.
“The sponge or ascidian just keeps growing and will mould to the shape of the crab’s back,” he said. “It will never attach … it forms a nice cap that fits quite snugly to the top of the crab."
Similar to how hermit crabs use shells for protection, the sponges help Dromiidae crabs to camouflage from predators such as octopuses and other crabs.
The sponges can be bigger than the crab itself, and also provide a chemical deterrent. “Some of the compounds that these sponges are producing are very noxious,” Hosie said. “There’s not a lot of active predators that would be interested in munching through a sponge just to get to a crab.”
Sponge crabs in general come in many different shapes and sizes; L. beagle (pictured above) has a uniquely dense, shaggy coat of "fur" covering its body, but other members of the genus Lamarckdromia have a much less shaggy appearance, and there are many sponge crabs that have no layer of "fur" at all.
Some examples of the other sponge crabs within the Dromiidae family:
I know this isn't exactly the type of arthropod that I'd normally discuss on my blog (given that it's not a moth or some other insect) but technically crustaceans are arthropods, and these ones are really weird/interesting...so I figured that I might as well just go with it.
Sources & More Info
The Guardian: "Fluffy" Crab that Wears a Sponge as a Hat Discovered in Western Australia
Reef Builders: Lamarckdromia Beagle is a New Species of Sponge Crab from Australia
Zootaxa: Sponge Crabs of Western Australia and the Northwest Shelf with Descriptions of New Genera and Species
LiveScience: Extremely Fuzzy Sponge Crab
Australian Broadcasting Corporation: New Sponge Crab Species Found off WA Coast Named After Charles Darwin's Research Boat
Slate: Meet the Fluffy Crab that Wears a Hat
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