It’s Crabzilla! Biggest Known Crab On Earth

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Japanese Spider Crab

Hail Crabzilla! The Japanese Spider Crab is the biggest arthropod on Earth–their legs are believed to grow up to 12 feet long. But since they live at such great depths (typically 1,000 feet down or so) a full grown spider crab has yet to be caught. So for now, we’ll have to make due with the 5 foot long Crabzilla (that’s what it’s called–I didn’t make it up!), one of the largest known crabs in the planet.

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Crabs Feel Pain and Remember It

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Not so good news for crustacean lovers.  According to a research from Queen’s University Belfast researchers, crabs not only feel pain, but also remember it.  Professor Bob Elwood and Mirjam Appel, whose study was published in the journal Animal Behavior,  used electric shocks on hermit crabs to determine their response to unpleasant external stimuli.

Wires were attached to shells to deliver the small shocks to the abdomen of the some of the crabs within the shells.The only crabs to get out of their shells were those which had received shocks, indicating that the experience is unpleasant for them. This shows that central neuronal processing occurs rather than the response merely being a reflex.

Continue reading… “Crabs Feel Pain and Remember It”

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