Tomini Tang (Ctenochaetus tominiensis) Breeding Guide

Why Ctenochaetus tominiensis is not bred at home: this small bristletooth surgeonfish is a pelagic free-spawner whose acronurus larvae drift in the open ocean before settling on the reef.

Overview

The Tomini tang, Ctenochaetus tominiensis, is a smaller bristletooth surgeonfish from the western Pacific. Bristletooths bear many small flexible comb-like teeth used to graze detritus and film algae from reef surfaces. Like other members of the family Acanthuridae it is a free-spawning reef fish that releases pelagic eggs, so it is not reproduced in home aquaria.

Spawning Behavior & Trigger

Surgeonfishes spawn by releasing eggs and sperm into the water column, typically after forming aggregations or pairing on the reef, with spawning tied to natural lunar and tidal cycles. Such open-water reproduction cannot be reproduced inside an aquarium.

Egg & Fry Care

Fertilised eggs are pelagic and develop into the transparent open-ocean acronurus larva characteristic of surgeonfishes, which maintains a planktonic existence before settling nearshore and developing into a juvenile. The fragility and feeding demands of this larval phase put rearing beyond home means.

Common Challenges

No documented home breeding of the Tomini tang exists. The pelagic spawning strategy and long-lived planktonic acronurus larva confine any breeding attempt to dedicated marine aquaculture facilities.