Wiktionary
paralarva
n. (context zoology English) The planktonic (moving about with the water current) stage of a young cephalopod just after it has hatched
Wikipedia
Paralarva
Paralarvae (singular: paralarva) are young cephalopods in the planktonic stages between hatchling and subadult. This stage differs from the larval stage of animals that undergo true metamorphosis. Paralarvae have been observed only in members of the orders Octopoda and Teuthida.
The term was first introduced by Richard E. Young and Robert F. Harman in 1988.