 One of the most common findings is that juvenile squid (>200 mm ML) consume a greater percentage of crustaceans and cephalopods compared to their size than mature squid, which consume a large percentage of fish and virtually no crustaceans.Globally, however, myctophid fish (lantern fish) are seen as common prey.Larger squid are known to practice cannibalism (accounting for up to 6% of diet).