Richmond's Wrasse Breeding Guide

Halichoeres richmondi is a Western Pacific reef wrasse that is not bred in home aquaria; this guide covers its protogynous biology and pelagic broadcast spawning in the wild.

Overview

Halichoeres richmondi is a Western Pacific labrid recorded by FishBase at 19.0 cm TL, occurring from Java and the Philippines to the Ryukyu Islands, Moluccas, Palau, Truk, Pohnpei and Kwajalein at depths of about 1 to 15 m in warm reef water (preferred range near 27.5-29.3 C). It is a peaceful sand-associated wrasse that, like its congeners, buries in the substrate at night. It is not bred in home aquaria.

Sexing

As a member of a protogynous genus, H. richmondi begins life in the female (initial) phase, with larger individuals capable of changing into terminal-phase males. The species shows the intricate pink-and-yellow facial line pattern over a green-blue body that intensifies in larger terminal males, so practical sexing relies on size and colour-phase development rather than an external genital difference.

Conditioning

No home-conditioning method is established for this species. In captivity Halichoeres wrasses are maintained on varied meaty foods reflecting their carnivorous diet of small benthic invertebrates, but conditioning a broadcast-spawning reef wrasse specifically for reproduction has only been pursued in research aquaculture, not in hobby tanks.

Breeding Setup

There is no documented domestic spawning setup. FishBase notes distinct pairing during breeding. The fish requires reef structure and a deep sand bed for burying, and the open water column needed for pelagic spawning ascents cannot be replicated in an aquarium, so the knowledge-base minimum of 250 L describes husbandry rather than any breeding configuration.

Spawning Behavior & Trigger

In nature, labrid reproduction is broadcast spawning: a pair or group ascends and releases planktonic eggs into the water column, which currents disperse, with no parental care afterward. Spawning is governed by photoperiod, tide and the social dynamics of the harem and its terminal male, none of which are deliberately controllable by hobbyists.

Egg & Fry Care

Eggs and larvae are pelagic. No larval data is published specifically for H. richmondi, but rearing trials on the congener Halichoeres melanurus describe eggs of about 660 um and larvae of roughly 2.5 mm at hatch settling near 22 days post-hatch on cultured live prey. The very small mouth gape and long planktonic phase explain why larval survival is a facility-level problem.

Common Challenges

The principal obstacle is that planktonic eggs and larvae cannot be retained and fed in a display tank: eggs scatter, first-feeding larvae need cultured microplankton, and the protogynous harem system adds further complexity. For these reasons home propagation of H. richmondi is not currently achievable.