Several crabs appear in Finding Nemo. Notably, two crabs surround the sewage pipes, fighting for the scraps which emerge through the bubbles. One, voiced by Rove McManus, tries to catch Nemo, but fails. The crabs constantly yell "Hey!" at any fish that swim past them.
Later, Nemo and Dory return, asking the crabs if they've seen Marlin. The yellow crab admits that he did, but refuses to give out any information -- until Dory holds him above water, as a tempting morsel for the seagulls.
During the credits, one of the crabs can be seen dangling from one of the filmmakers' names.
- According to the Pixar Character Encyclopedia, their names are Bernie (yellow) and Baz (red).