Zoea n. : A peculiar larval stage of certain decapod Crustacea, especially of crabs and certain Anomura.

Example:
What are some good Scrabble/Lexulous words to know?

Taxonomy
zoea, free encyclopedia, larval stage, crustacean, spikes, abdominal appendages, search, larva, Homarus gammarus, zoeae, larvae, swim, nauplii, cephalic, megalopa, organisms, improvement, accelerated development.

Defination from the web:
Zoea larvae swim with their thoracic appendages, as opposed to nauplii, which use cephalic appendages, and megalopa, which use abdominal appendages for swimming. ... In many decapods, due to their accelerated development, the zoea is the first larval stage. ...