Zebra Otocinclus Breeding Guide

What is known about breeding Otocinclus cocama: spawning has been achieved in aquaria but documented details are very limited, with tiny fry needing abundant algae.

Overview

The zebra otocinclus (Otocinclus cocama) is a small loricariid catfish from the lower Ucayali and Marañón river systems of Peru, reaching only 40-45 mm standard length. It is an algae grazer that has spawned in aquaria, though it is regarded as a challenging fish to breed.

Sexing

Males are roughly 5-10 mm smaller than females and possess a conical urogenital papilla behind the anus, which is absent in females. Males also bear a small flap on the dorsal surface of the pectoral fin.

Spawning Behavior & Egg & Fry Care

Seriously Fish notes only that spawning has been achieved but that very few details are available. The fry are presumed to be very tiny and to require access to copious amounts of algae and other green matter once free-swimming. Because of the limited documentation, no reliable account exists of clutch size, egg-deposition site or precise spawning triggers for this species.

Common Challenges

Imported specimens are delicate and should be quarantined and settled in a mature, established tank that provides biofilm and algae for grazing before any breeding attempt. Stable, soft to moderately hard water (21-25 °C, pH 6.0-7.5) and a well-fed conditioned group give the best chance of success.