Species description

Care, breeding and tankmates

Fish profile

Temperament

Active

They exhibit a generally peaceful and skittish temperament when kept in groups. However, they can be easily startled and may dash erratically. Providing ample swimming space and secure hiding spots keeps them calm.

Diet

Herbivore

They are primarily herbivorous, feeding heavily on aquatic vegetation in the wild. In the aquarium, they readily accept vegetable-based flakes and blanched zucchini. Their main diet must be plant-based to ensure proper digestion.

Sex ratio

School

Adult males often display a more intensely colored and elongated anal fin. A specific male-to-female ratio is not strictly required for a community display. Keeping them in a large school balances their social interactions naturally.

Feeding frequency

Twice daily

They should be fed two to three times daily to satisfy grazing habits. Offering smaller portions frequently is better than a single large meal. A steady supply of greens deters them from destroying robust plants.

Bioload

High

The Redhook Myleus generates a high bioload due to its large adult size. A powerful and efficient filtration system is mandatory to keep parameters stable. Large, frequent water changes are necessary to remove significant metabolic waste.

Flow

Moderate

They prefer moderate to strong water currents that simulate South American rivers. Good water circulation is important for their exercise and assists heavy filtration. Strategically placed powerheads encourage their natural schooling behavior.

Jump risk

Yes

As powerful and easily spooked fish, they pose a significant jumping risk. A tight, heavy-duty aquarium lid is absolutely necessary to prevent escapes. Care should be taken to avoid sudden movements during tank maintenance.

Reproduction

Oviparous

Breeding in captivity is rare and requires a very large specialized setup. They are egg-scatterers that release large numbers of eggs among submerged vegetation. Commercial specimens are typically bred in massive outdoor ponds.

Compatibility & tankmates

Highly aggressive

This species is peaceful but large, making it unsuitable for very small fish. They do best in groups of at least five individuals. Small fish that fit into their mouths might be eaten or stressed.

Tank level

Top/Middle

They are primarily active in the middle levels of the aquarium. They require plenty of unobstructed horizontal swimming space for their size. The mid-water region is their primary domain for cruising.