Herichthys tamasopoensis Breeding Guide

Breeding the Tamasopo cichlid Herichthys tamasopoensis, a hard-water cave spawner that lays 200-300 adhesive eggs and turns white during courtship.

Overview

Herichthys tamasopoensis, the Tamasopo cichlid, is a Mexican cichlid from the Tamasopo area, reaching about 18 cm. Its habitat is fairly hard, alkaline water (pH about 7.8-8.3), with temperatures around 22 C in the dry season and below 18 C in the rainy season. It is a biparental cave spawner and is described as not too aggressive in the aquarium.

Sexing

Adult males develop a hump on the head, while females remain smaller. During courtship the fish turn nearly solid white, and some develop a black throat.

Breeding Setup

• Provide caves formed by rocks and driftwood; pairs deposit eggs against the side or top wall of a cave.
• Use sand substrate so the pair can dig nesting pits.
• Maintain fairly hard, alkaline water resembling the natural habitat.
• One pair can be kept in a tank from about 1 meter long.

Spawning Behavior & Trigger

The pair chooses a cave and deposits 200 to 300 eggs equipped with adhesive strings against the cave wall. Males establish territories about 1 meter across. The pair threatens intruders first, then makes a quick decisive attack before returning to the brood. During breeding the pair should be kept alone.

Egg & Fry Care

After 2 to 3 days of fanning the larvae hatch and are moved to nesting pits until their yolk sacs are absorbed. Both parents tend the clutch. In nature the young feed on algae and detritus; in the aquarium they can be raised on brine shrimp nauplii and dust food, and maintaining some algae on tank surfaces aids rearing.

Common Challenges

Although not strongly aggressive, breeding pairs should be isolated, as they defend their territory and brood. Provide hard alkaline water and sufficient cave structure for reliable spawning.