Red Tail Hemiodus Tetra - Hemiodus gracilis : Complete Fish Profile & Care Guide

Introduction

The Red Tail Hemiodus Tetra (Hemiodus gracilis) is a strikingly beautiful fish that is often misunderstood as semi-aggressive, but their nervous nature and fast-swimming habits can sometimes intimidate smaller, slower-moving fish. Despite their intimidating size and speed, Red Tail Hemiodus Tetras are peaceful, shoaling fish that prefer to be kept in groups of ten or more individuals in a well-established aquarium. These Tetras can be kept in a community tank with similarly-sized, peaceful species like Rainbowfish, Discus, Bala Sharks, and Angelfish, but should not be housed with much smaller fish.

The design of the aquarium should prioritize spaciousness, even when considering smaller specimens, as they are capable of swift and vigorous swimming, necessitating a substantial expanse for their activity. Optimal placement for the aquarium involves selecting a tranquil location and minimizing exposure to frequent pedestrian traffic. Given the skittish nature of these fish, which are easily alarmed, it is imperative to incorporate numerous shaded hiding spots within the aquarium, supplemented by a securely fitted lid to prevent any inadvertent leaps out of the enclosure.

The selection of decor mandates careful consideration, as any sharp elements pose a risk of injury when these fish seek refuge. A substrate consisting of smooth sand, complemented by gentle driftwood pieces and water-worn rocks, is strongly recommended. To create a harmonious habitat, the aquarium should be adorned with sturdy plant species and Java Fern along the sides and rear while maintaining a generously proportioned open swimming zone at the centre. Additionally, resilient floating vegetation can be cultivated in the calmer sections of the aquarium, serving as natural surface coverage and contributing to the mitigation of skittish behaviour.

When performing maintenance tasks on the aquarium, utmost caution must be exercised to prevent causing undue stress to the fish. It is of paramount importance that the environment housing these Tetras is characterized by robust filtration via external canister systems and optimal aeration, potentially incorporating supplementary powerheads. Placing the spray bar returns from filters slightly above the water line to induce turbulence is advisable. Given the riverine disposition of these fish, it is imperative to maintain a consistent emphasis on water quality. Regular partial water changes are essential to prevent the accumulation of nitrogenous waste.

These Tetras have a sturdy body with slightly flattened side and a deeply forked tail. Their silvery body colour has greenish tones, and they have a distinctive black band running along the lower edge of their caudal fin. Below the black band, there is an intense red stripe that adds a beautiful pop of colour to their appearance.