Biology of Finfish and Shellfish

4.12.6. Nauplius V

MTL: 0.38 mm (0.35-0.41 mm); MW: 0.17 mm (0.15-0.20 mm); MFS; 0.23 mm (0.20-0.28 mm).

Furcal lobes well developed, each carrying 6 setae minute outermost one being dorsally placed; rudimentary oral appendages become bigamous; endopod of A2 with 2 short setae on inner lateral margin and 3 long plumose setae and 1 rudimentary seta terminally, exopod with 9 setae along inner and distal margin, of which distal outer and inner proximal rudimentary and spine like; a prominent rounded swelling appears at base of Md; no change in A1 setation. Duration of this sub stage was 10 to 12 hours.