Kole Tang (Ctenochaetus strigosus) Breeding Guide

Ctenochaetus strigosus is a pelagic broadcast-spawning surgeonfish with long-drifting acronurus larvae; it is not bred in home aquaria, only research aquaculture.

Overview

The kole tang, Ctenochaetus strigosus, is a Pacific surgeonfish of the family Acanthuridae. Like other tangs it reproduces by pelagic broadcast spawning, releasing eggs and sperm into open water for external fertilisation, with planktonic eggs and larvae. As a result it is not bred in home aquaria.

Spawning Behavior & Trigger

Surgeonfishes generally spawn at dusk in brief pair- or group-spawning events, forming aggregations and releasing gametes into the water column, with spawning often showing lunar periodicity. Such open-water ascents and aggregations cannot be reproduced in aquarium conditions.

Egg & Fry Care

Fertilised eggs are pelagic and develop into the transparent, open-ocean acronurus larva characteristic of tangs, which drifts in the plankton for an extended period before settling on a reef. The acronurus is fragile, sensitive to water quality and dependent on specialised micro-prey, so it cannot be reared without dedicated hatchery technology.

Common Challenges

Surgeonfish aquaculture has been achieved only at research scale; the first acanthurid bred in captivity was the yellow tang (Zebrasoma flavescens) by the Oceanic Institute in 2015 after about a decade of work with cultured copepod prey. No comparable home-aquarium method exists for the kole tang.