Nicaragua Cichlid Breeding Guide

How to breed Hypsophrys nicaraguensis, a Nicaraguan cichlid notable for laying non-adhesive eggs in a pit rather than gluing them to a surface.

Overview

Hypsophrys nicaraguensis, the Nicaragua cichlid, is native to the Atlantic slope of the San Juan drainage, including Lake Nicaragua, and the Matina River drainage in Nicaragua and Costa Rica (FishBase, Seriously Fish). It is notable among Central American cichlids: unlike most pit-spawners, its eggs are not adhesive and simply sit on the substrate in a sand depression.

Sexing

Females are smaller with more vibrant colour and retain a black lateral stripe, while males develop a nuchal hump on maturing and the stripe reduces to a single flank spot (Seriously Fish). FishBase lists females reaching about 20 cm and a maximum length around 25 cm.

Breeding Setup

Provide an open sand area for digging and caves or rockwork. Seriously Fish gives breeding water of about 23-28 °C, pH 7.0-8.0 and hardness 8-20 °H; FishBase lists a species range of 23-36 °C, pH 7.0-8.0 and hardness 9-20 dH. The best way to get a pair is to start with six or more young fish and let them pair off; pairs typically bond for life.

Spawning Behavior & Trigger

Eggs are deposited in sand depressions and, unusually for the region's pit-spawners, are non-adhesive (FishBase, Seriously Fish). The female initially guards the cave or pit while the male patrols the territory boundaries, after which both partners cooperate in protecting young and territory.

Egg & Fry Care

A spawn produces about 200-400 non-adhesive eggs (FishBase). Eggs hatch in 2-3 days and the fry become free-swimming after a further 3-5 days; they can be fed brine shrimp nauplii and then powdered dried foods (Seriously Fish). FishBase notes females may practise communal care, with several females guarding combined spawns.

Common Challenges

The species is only semi-aggressive compared with most large Central American cichlids, but pairing still requires growing a group together. Maintaining an open sand substrate for the non-adhesive eggs is important for a successful spawn.