- "shrimp-like" - usually quite small - size range: 1/8" - 1/4"
Scuds look basically like little shrimp and they actually belong to the same subphylum, Crustacea. They have a swimming motion similar to that of the crayfish, propelling themselves backwards through the water with quick strokes of their tails. They may be slightly orange or green and are somewhat translucent and shiny with some silvery-gray coloration.