Larvae Summary

Larvae Information Summary for Scophthalmus aquosus

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Yolk-sac larvae

	max	min	mod	Ref.
Length at birth (mm)			2	68
Preanal L. % TL	50

Place of development	planktonic
Larval area	Mid-Atlantic Bight (Cape Hatteras to the Southern Scotian Shelf; Delaware Bay)
Yolk-sac		Ref:
Yolk		Oil globules
Rows on tail	no rows
Other melanophores on tail	tail partly covered with melanophores
Melanophores on head + trunk	melanophores on head + trunk
Heavily pigmented from head to midtail, with posterior 1/3 unpigmented.

Post larvae

Striking feature	lower jaw strongly projecting
Striking shape lateral	short and/or deep	dorsal
Striking feature	lower jaw strongly projecting
Shape of gut	triangular
Gas bladder early		late
Spinal armature early	no spines	late	no spines
Pigmentation early
Rows on tail	no rows
Other melanophores on tail	tail partly covered with melanophores
Melanophores on head + trunk	melanophores on head + trunk
Pigmentation late
Rows on tail	no rows
Other melanophores on tail	tail partly covered with melanophores
Melanophores on head + trunk	melanophores on head + trunk
Urostyle region early	unpigmented	late	unpigmented
Pectorals	normal
Pelvics	other
Body deep, especially in gut area, and compressed; pelvic fins unequal in size, both bases long with left longer, both origins on urohyal, left base on ventral midline, right base above midline; no elongate rays. Eye begins to move to the left side at about 6.5 mm. Migration of eye nearly complete at about 13 mm. Late postlarval and adult windowpane separable from all other Bothidae due to left ventral fin being as wide at the base as it is at the tip. Pigmentation: bars of pigment form and extend onto fins, with pronounced contrast between pigmented and unpigmented areas. Sequence of fin formation: pectoral fin rays form after transformation; all fin rays complete at about 8.5 mm TL.

Meristic characters

	max	min	mod	Ref.
Total number of myomeres	36	34		68

	L 1st feeding	Ref.	Months of presence of larvae Ref.
max			Jan	Feb	Mar	Apr
min			May	Jun	Jul	Aug
mod			Sep	Oct	Nov	Dec

Water parameters Metric characters

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