Species description

Care, breeding and tankmates

Fish profile

Temperament

Territorial

This species is remarkably peaceful, active, and harmless to other fish. They are very nervous when kept in inadequate numbers, often hiding and losing their translucent coloration. In a proper school, they confidently swim in the open, displaying their fascinating transparent bodies.

Diet

Omnivore

Ambassis dussumieri is a micro-predator that feeds primarily on small aquatic insects and zooplankton in the wild. In the aquarium, they will accept high-quality crushed flakes but prefer live or frozen foods. Regular offerings of daphnia, brine shrimp, and bloodworms are necessary to maintain their health and coloration.

Sex ratio

School

Females are generally deeper-bodied, especially when gravid, while males often possess a more pronounced yellow hue on their fins. They must be maintained in a group of at least six individuals to feel secure. A proper school structure prevents stress and promotes natural social behaviors.

Feeding frequency

Twice daily

They should be fed small portions one to two times daily to ensure they receive adequate nutrition. Feeding them small amounts prevents uneaten food from decomposing and affecting water parameters. Ensuring the food pieces are small enough for their tiny mouths is crucial.

Bioload

The Malabar glassfish produces a moderate bioload that is easily managed in a well-established aquarium. Because they are schooling fish, the cumulative waste of the group must be considered. Consistent biological filtration and routine water changes are sufficient to maintain good water quality.

Flow

Moderate

They appreciate a moderate water flow that provides good oxygenation without causing them to struggle while swimming. In their natural estuarine habitats, they experience tidal movements, so some current is beneficial. A strategically placed sponge filter or a gently baffled power filter works well.

Jump risk

No

Reproduction

Oviparous

Breeding the Malabar glassfish in captivity is challenging but possible in a dedicated setup with slightly brackish water. They are egg-scatterers that lay their eggs among fine-leaved plants like Java moss. The parents must be removed promptly after spawning to prevent them from predating on the eggs.

Compatibility & tankmates

Community

They are peaceful and somewhat timid fish that should be kept in a community tank with similarly sized, peaceful species. Suitable companions include small gobies, peaceful livebearers, and smaller rainbowfish. Large or aggressive fish will easily intimidate them and should be avoided.

Tank level

Middle

They spend the majority of their time navigating the middle and upper levels of the water column. They prefer tanks with open swimming areas in the center, flanked by dense vegetation around the perimeter. They will often hover in the gentle current facing the water flow.