Mesothorax Hogfish (Bodianus mesothorax): Breeding Notes

Bodianus mesothorax is an Indo-Pacific hogfish with striking juvenile-to-adult colour change. As a large pelagic-spawning wrasse it is not bred in home aquaria.

Overview

Bodianus mesothorax is an Indo-Pacific hogfish ranging from the Andaman Sea to Japan, Fiji and Australia, living on reefs at depths of about 5 to 40 metres. Wikipedia notes a dramatic colour change around 5 to 6 cm: juveniles are dark purple speckled with yellow spots, while adults show a blackish diagonal band separating the purplish head from a paler rear. It eats invertebrates and adults act as cleaner fish.

Sexing

Hogfishes are protogynous hermaphrodites: individuals mature first as females and the dominant fish becomes the terminal male, which is the largest in a group. There is no reliable colour-based way to sex this species in the aquarium beyond relative size and social rank.

Spawning Behavior & Trigger

Bodianus species form pairs and ascend into open water to release eggs and sperm, broadcasting them above the reef. Such pelagic courtship requires far more open volume than a home tank provides, and it has not been documented in captivity for this species.

Egg & Fry Care

The fertilised eggs float into the plankton and the larvae have a pelagic phase before settling. No home protocol exists for rearing the larvae, so the species is collected from the wild and imported, commonly from the Philippines and Indonesia.

Common Challenges

The large adult size, semi-aggressive temperament, protogynous biology and pelagic broadcast spawning make controlled reproduction impractical at home. Pairing two adults is risky, and the open-water gamete release cannot be replicated in a confined system.