Question: what do scuds look like?
Answer: You could describe scuds (members of the order Amphipoda) as “shrimplike sowbugs.” Like sowbugs (in the order Isopoda), they have two pairs of antennae; they lack a carapace (a covering “back” like a crayfish has); their eyes are not on stalks; and they have several body segments with legs, gills, and other appendages.