Many juvenile cephalopods, particularly squid and octopus, have an immediate
post-hatching phase that is planktonic (Boletzky, 1977). Typically, cephalopod species
undergo direct development, with a long embryonic phase, resulting in a hatchling that is
structurally and developmentally advanced (Boletzky, 1987; Okutani, 1987). Their
sensory systems are well developed and therefore these juveniles are probably better
equipped for prey capture and predator avoidance than their teleost counterparts.