Comprehensive Description

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Triplefins have demersal brooded eggs and hatch as well-developed larvae around 3-4 mm in length. The early-stage post-flexion larvae can be recognized by a moderately long and narrow body with a small pointed head, medium mouth, prominent jaw angle, large rounded eye, no head spines, snout-to-vent length slightly less than half of body length, long fin bases, and early-forming posterior dorsal and anal-fin elements. Pigmentation is distinctive, with a single midline surface melanophore over the rear braincase and a short row of two or three melanophores along the dorsal and ventral midlines of the caudal peduncle. In addition, there is a row of three ventral midline melanophores along the base of the rear portion of the developing anal fin. There are internal melanophores at the sacculus, over the swim bladder, and around the gut near the vent.

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