Pink Tail Chalceus Care Guide - Aquarium Setup, Diet & Breeding

The Pink Tail Chalceus is a striking, streamlined characin with a silvery to golden body, large reflective scales and a powerful forked tail. Its tail often develops a pink, rose or reddish wash, especially when the fish is mature and settled. The large scales and elongated shape give it a distinctive appearance among larger South American aquarium fish.

This is an active, fast-moving species that spends much of its time near the surface. It is an alert predator with a broad mouth, adapted for taking insects, small crustaceans and other prey from the water’s surface. In an aquarium it may be shy at first, but usually becomes confident when maintained in an appropriately sized group.

In nature, Pink Tail Chalceus are associated with warm tropical waterways, including habitats influenced by overhanging vegetation and submerged branches. Their surface-oriented lifestyle allows them to exploit insects falling from the surrounding forest, while their speed helps them avoid larger predators.

Although sometimes sold as a community fish when young, this species grows into a substantial and energetic predator. Its combination of size, speed and jumping ability makes it best suited to experienced aquarists with a large aquarium and carefully chosen tankmates.

Pink Tail Chalceus are native to tropical South America, particularly the Amazon and Orinoco drainage systems, including parts of Brazil, Colombia, Peru and Venezuela. They inhabit warm, slow to moderately flowing rivers, tributaries and flooded forest environments.

A group of Pink Tail Chalceus should be kept in an aquarium of at least 300 litres, with a larger aquarium strongly preferred for adult fish. A tank measuring around 150 cm long by 50 cm wide provides a useful minimum footprint, although extra length is valuable because this species is an energetic swimmer. Leave a broad open area for cruising, with driftwood, sturdy plants and shaded areas around the sides and rear. Use a dark, secure-fitting lid, as the fish can launch itself from uncovered tanks. A fine sand or smooth gravel substrate is suitable, with efficient filtration and moderate water movement.

Up to 25 cm (9.8 inches) in total length. Females may be slightly deeper-bodied and heavier than males, particularly when mature.

Pink Tail Chalceus are carnivorous predators that naturally eat insects, aquatic invertebrates, small crustaceans and occasionally small fish. Offer a varied diet of quality carnivorous pellets and flakes alongside frozen or live foods such as prawns, krill, chopped earthworms, bloodworms and insect larvae. Floating foods are particularly useful because this species commonly feeds at the surface. Feed appropriately sized portions and avoid relying on feeder fish, which can introduce disease and provide an unbalanced diet.

Suitable tankmates include similarly sized, robust South American fish such as large peaceful characins, silver dollars, larger peaceful cichlids and substantial bottom-dwelling catfish. Tankmates should be too large to swallow and calm enough not to be intimidated by this active surface feeder. Avoid small tetras, rasboras, livebearers, shrimp and other diminutive fish, which may be treated as prey, as well as highly aggressive or slow, long-finned species. A secure lid is essential because Pink Tail Chalceus are powerful jumpers.

Pink Tail Chalceus are rarely bred in home aquariums, and reliable captive-breeding information is limited. They are believed to be open-water egg scatterers, releasing eggs among fine-leaved plants or spawning mops, with no parental care. A separate, spacious breeding aquarium with excellent water quality, gentle flow and abundant cover for the eggs would be appropriate; adults should be removed after spawning because the eggs may be eaten.

Sexual differences are subtle. Mature females are usually fuller through the abdomen and may be slightly more robust, while males tend to remain slimmer; colour and fin shape are not consistently reliable ways to sex this species.