Invasive European green crabs are wreaking havoc in Washington state. New research suggests an additional way to stop their spread.

Mabui calculus, a newly-discovered crab is unique among 7,800 known species, because it has asymmetrical male and female reproductive structures.

A newly described species of crab, Leptarma biju, is a noctural tree-climber. Perhaps that's why explorers hadn't noticed it before.

New research describes how climate change leads to voracious crabs becoming troublesome keystone species in more and more salt marshes.

Hermit crabs choose their shells and can ditch old ones for new, better ones. Check out this video to learn what they can show us about wealth inequality.

Although chimpanzees mostly stick to a vegetarian diet, those in the rainforest also catch and eat crabs.

A new species, whose name translates to "beautiful perplexing chimera," is forcing scientists to re-think what they know about crabs.

Low oxygen levels and low pH conditions are upping mortality for blue crab larvae, and climate change will only make the situation worse.