This is zoea 4,at 7 dah and 4.2mm.This is the stage where the famous pp5,these long curved legs with big red paddles at the end,first show.
Antennule (A1)has forked in two branches,or flagellums.
There are three pairs of walking legs:mp3,pp1 and pp5.And three pairs of swimming legs:mp2,mp3 and pp1.
Tail fin endops have colored up and are a little shorter than the telson.