Ophthalmotilapia paranasuta Breeding Guide

Breeding Ophthalmotilapia paranasuta, a Tanganyikan featherfin and recently split sister species of O. nasuta. A sand-bower-building maternal mouthbrooder.

Overview

Ophthalmotilapia paranasuta is a featherfin cichlid from Lake Tanganyika, recently described as a sister species split from O. nasuta. Because dedicated published data for this newly recognized species are scarce, this guide describes the well-documented Ophthalmotilapia (featherfin) breeding pattern at genus level; like its relatives, it is a maternal mouthbrooder in which males build sand bowers and use egg-dummies on their elongated ventral fins.

Sexing

Per Seriously Fish, male Ophthalmotilapia are larger and more colorful with longer fins than females, particularly the ventral (pelvic) fins that carry the egg-dummy tips. Females are plainer and shorter-finned.

Conditioning

Seriously Fish advises conditioning with plenty of high-quality foods before spawning. Hard, alkaline Tanganyikan water suits these featherfins; quoted genus parameters are about 23-27 °C, pH 7.5-9.0 and hardness 8-25 °H.

Breeding Setup

Males build crater-like nests in the sand or on flat rock and defend them, and they can be very aggressive, so Seriously Fish recommends harem spawning with one male and several females and ample sand for bower construction.

Spawning Behavior & Trigger

According to Seriously Fish, the male displays intense color at his nest to attract females. He carries egg-shaped structures on the tips of his long ventral fins; when a female tries to take these dummies into her mouth she receives sperm, fertilizing the eggs she is already holding. The female does not eat during the subsequent brooding period.

Egg & Fry Care

Per Seriously Fish, the female mouthbroods for about 3-4 weeks before releasing free-swimming fry. The fry accept brine shrimp nauplii and crushed spirulina-based flake from the day they are released.

Common Challenges

Male aggression toward females during courtship is the chief difficulty, which the harem layout and a large sandy footprint help manage. As a recently split species, keeping O. paranasuta separate from O. nasuta and other featherfins is important to avoid hybridization.