Uncommon Descent Serving The Intelligent Design Community

Crabs evolved separately at least five times

Denyse O'Leary
October 21, 2020
Convergent evolution, Intelligent Design
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Now, at Popular Mechanics, readers are learning about convergent evolution. The process of turning into a crab is called “carcinization.”

That crabs (both “true” and ersatz) have so densely but separately evolved the same form is highly unusual, even in a world full of these examples of strong parallel and convergent evolution. “The fact that a crab-like habitus did not evolve solely in ‘true’ crabs but also several times independently in the Anomura makes this process ideal for evolutionary research,” the researchers explain.

It’s not just superficial shape that unifies the five evolved crab forms. The paper details neurological commonalities, shared circulatory systems, and more, while also detailing the organ and systems that differ in shape and size.

Moreover, the crab-shapedness of the groups can make it hard to trace what came about from interacting internal systems as opposed to, well, the crab shell…

Caroline Delbert, “Animals Keep Evolving Into Crabs, Which Is Somewhat Disturbing” at Popular Mechanics

So they share these qualities without common descent? Hmmm.

Here’s the open-access paper from 2017.

See also: Evolution appears to converge on goals—but in Darwinian terms, is that possible?

Hat tip: Philip Cunningham

Comments
JAWA, thank you for mentioning my Stuff-happens blog on repeated evolution. Animals-evolving-into-Crabs-miracle already added here: https://stuffhappens.info/repeated-evolution-crabs-evolved-separately-at-least-five-times-what-is-it-some-kind-of-joke/ martin_r
If at first you don't succeed, try, try again! That Natural Selection just never gives up! PaV
Popular Mechanics “Animals Keep Evolving Into Crabs, Which Is Somewhat Disturbing” the whole Darwinian evolutionary theory is somewhat disturbing as we see, in Darwinian fantasy world, everything is possible by random mutations ... crabs with neurological commonalities, shared circulatory systems, and more, evolved multiple times independently (no common ancestor was needed) .... and all that by random mutations.... excuse me, Darwinians, ... is this some kind of joke ? WHO ON EARTH CAN BELIEVE THIS NONSENSE ? Obviously, in that Darwinian fantasy world the same miracle can happen over and over again ... so, who believes in miracles ? Darwinian clowns do ... For more Darwinian miracles, please visit my blog at www.StuffHappens.info martin_r
EDTA,
They're still ugly.
Lovecraftian, even. daveS
Mac McTavish/9
I wish they had evolved easier to crack shells and a circulatory system filled with butter and garlic.
Pretty poor design if you ask me. :) Seversky
I wish they had evolved easier to crack shells and a circulatory system filled with butter and garlic. Mac McTavish
So here's a test for evolutionists: If someone gives you a critter, which is one of several that have convergently evolved, you should be able to predict (i.e., without knowing what the other critters are) which _characteristics_ did and did not convergently evolve. Will it be their coloration, their skeletal structure, etc. EDTA
>Crabs evolved separately at least five times They're still ugly. EDTA
And yet we are told that dogs can't evolve into cats cuz cats already exist (true story). :roll: ET
Those crabs were all closet creationists anyway. Someone from Big Science better DO something about it, right? News
It’s common design. jawa
Martin_r shows many cases of this in his interesting blog. Just click on the link associated with his name in his comments to see it. jawa
I always thought the process of turning into a crab was called "PMS". polistra
I would say it's just one more nail in the coffin of Darwinism, but there's so many nails that finding a place to put another would prove difficult. BobRyan

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