Comb-Tail, Combtail Paradis (Belontia signata) — 4,5-5,5cm

Overview

The Comb-Tail Paradise Fish (Belontia signata), also known as the Ceylonese Combtail, is a striking Sri Lankan labyrinth fish celebrated for its comb-like fins and bold personality. Endemic to shallow, slow-flowing streams in Sri Lanka, this semi-aggressive species thrives in spacious aquariums with strong filtration and robust tank mates. Available for sale UK-wide, the Comb-Tail is an excellent choice for aquarists seeking a unique, hardy centerpiece fish with moderate care requirements.

Appearance and Coloration

Belontia signata displays a robust, deep-bodied profile with iridescent coloration that shifts between olive-green, bronze, and red-brown depending on mood and lighting. Males are more colorful than females, with extended, comb-like fin rays and intensified hues during courtship and territorial displays. The species has large, expressive eyes, a slightly upturned mouth, and distinctive comb-like extensions on the caudal and dorsal fins.

Natural Habitat

The Comb-Tail Paradise Fish is endemic to shallow, slow-flowing clear-water streams in Sri Lanka. These habitats feature soft to moderately hard water, abundant vegetation, submerged wood, and stable tropical temperatures. The fish shelter among plants and roots, establishing territories and hunting for insects, larvae, and small invertebrates.

Aquarium Setup

A minimum 250-litre aquarium is essential for the Comb-Tail Paradise Fish. Provide plenty of cover using driftwood, caves, smooth rocks, and hardy plants such as Anubias, Java Fern, or Vallisneria. Gentle filtration maintains water quality without creating excessive current, which stresses this species. A secure lid is essential, as labyrinth fish can breathe atmospheric air and may attempt to jump.

Water Parameters

Maintain neutral to slightly acidic water with pH 6.5-7.5 and temperatures between 24-30°C. General hardness (GH) of 5-12 dGH is ideal. The Comb-Tail Paradise Fish is adaptable but performs best in stable, well-filtered water with excellent quality. Perform weekly water changes of 20-25% to control nitrate and maintain stable parameters. Although it can tolerate low oxygen due to its labyrinth organ, it still does best in clean, well-oxygenated water.

Feeding and Diet

Belontia signata is an omnivore with a preference for meaty foods. Offer quality pellets or granules as a staple, supplemented with frozen and live foods such as bloodworms, brine shrimp, daphnia, and insect larvae. Limited vegetable matter or algae-based foods provide balanced nutrition. Feed once or twice daily in portions that are consumed within a few minutes.

Behaviour and Personality

The Comb-Tail Paradise Fish is a semi-aggressive, territorial labyrinth fish that establishes and defends territories within the aquarium. Males are particularly territorial, especially during breeding, and may spar with other males or similarly colored species. This species is generally peaceful toward mid-water or surface fish but can be aggressive toward conspecifics or other bottom dwellers.

Tank Mates

Suitable tank mates include robust, similarly sized peaceful fish such as large rasboras, medium-sized catfish, and non-aggressive bottom dwellers of similar size. Avoid small fish, shrimp, slow-moving long-finned fish, fin-nippers, and other combtails. The Comb-Tail Paradise Fish coexists well with similarly sized, active fish in spacious, well-structured aquariums.

Breeding

Belontia signata is a bubble-nesting labyrinth fish. Breeding is possible in a quiet, well-planted tank with soft to moderately hard water and a calm pair. Males build bubble nests at the surface and court females with elaborate displays. After spawning, the male guards the nest and eggs. Remove the female after spawning to prevent aggression. Fry are tiny and require very small foods such as infusoria or liquid fry food initially, graduating to baby brine shrimp as they grow.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we specialize in rare and unique labyrinth fish sourced from trusted suppliers and quarantined for your peace of mind. We provide expert guidance on tank setup, water chemistry, and compatible stocking to help you create a thriving semi-aggressive aquarium. With fast, reliable delivery across the UK and a commitment to quality fishkeeping, Tropical Fish Co is your premier destination for striking and engaging freshwater fish.