Crab: the common crab(lat. cancer, fr. ecrevisse) occurs on the coat of arms of several families.
Argent, on a bend sable between two crabs of the second a cross crosslet of the first--CROSSE.
Argent, a crab sable--SHRODER.
Argent, a chevron engrailed azure between three crabs gules--BRIDGER, co. Gloucester.
Argent, three crabs erect sable--ALLYM.
Argent, three crabs erect, gules--ALVANSTON.