Yellowhead Wrasse
Halichoeres garnoti
    Ecological Descriptors
Habitat Size (cm) Diet Behaviour Sex 
Co, R 19 Ech, Cru, Mol I, Sh PGH
Most wrasses are protogynous hermaphrodites, with some Initial Phase (IP) females, turning into Terminal Phase (TP) males once they reach a certain size.

Terminal phase (Males): Anterior part of the body and the
head yellow. Halfway the body there is a black cross-band that curves backward at the dorsal fin and runs along its base to the tail. Rear body and tail dark blue to green. Two wavy lines radiate from the rear of the upper part of the eye.
Initial phase: Body with a yellow belly and a dark to dusky back, often shaded with blue. Color shadings highly variable, especially intermediates between terminal and juveniles phases.
Two wavy lines radiate from the rear of the upper part of the eye.
Juvenile phase: Usually bright yellow, rarely shading to reddish gold, with a brilliant blue
midbody stripe.

This species is reef associated and is found at depths of 2-90m (6-290ft). It is commonly found on shallow and deep reefs and exposed rocky ledges.  It feeds on various invertebrates.

Life Cycle
It is a protogynous hermaphrodite. Length at sex change ~7.5 cm.  It forms leks during breeding.

Pelagic spawners. One male, in terminal phase, spawns with many females in the initial phase (sexually mature). This reproduction process occurs daily before sunset. Subsequent to the hatching of the eggs, larvae are also pelagic, and remain above the bottom of the ocean subject to the ocean currents, until they  settle at relatively large sizes (9-12mm) on the reef. Although all are initially female and have the ability to change sex, the females that are larger are usually the prime candidates to become male since males are larger than females.
Yellowhead Wrasse TP
Yellowhead Wrasse
Yellowhead Wrasse IP