Green Puffer (Tetraodon fluviatilis) Breeding Guide

Breeding the brackish green puffer Tetraodon (Dichotomyctere) fluviatilis: flat-surface spawning, male egg-guarding and why home breeding is rarely documented.

Overview

The green puffer, Tetraodon fluviatilis, was moved to the genus Dichotomyctere in 2013 and is now also referred to as Dichotomyctere fluviatilis. It is a brackish-water pufferfish of South and Southeast Asia, living in fresh to slightly brackish water in rivers, estuaries, lakes and flood plains. It has been spawned in aquaria, but little information is available, and reliable home-breeding accounts are scarce.

Sexing

External sexual dimorphism in this species is undocumented; reference sources list sexing as unknown, with no reliable visible differences between males and females identified.

Breeding Setup

No breeding-specific water chemistry is documented beyond the species' normal brackish maintenance conditions. A spacious species tank with stable brackish water and flat, open surfaces (such as flat rock or substrate) provides potential spawning sites.

Spawning Behavior & Trigger

When spawning occurs, the female lays her eggs on a flat surface. The eggs are demersal and adhesive. Documented accounts of natural aquarium spawning are limited; much of the detailed reproductive data for this species comes from hormone-induced spawning trials rather than spontaneous tank spawning.

Egg & Fry Care

After spawning, the male guards the eggs until they hatch. Hatching has been recorded around 4 to 5 days after spawning, and in study conditions the larvae were reared comparatively easily, initially fed on rotifers (Brachionus plicatilis complex).

Common Challenges

The principal obstacles are the lack of reliable external sexing, the scarcity of documented spontaneous aquarium spawning, and the need to maintain stable brackish conditions. Most concrete reproductive data derive from controlled study settings rather than ordinary home aquaria.