Brackish archer fish

Species Profile

• Scientific Name: Toxotes jaculatrix

• Common Name: Banded Archerfish, Archer Fish

• Adult Size: 8–12 inches (20–30 cm)

• Life Expectancy: Approximately 5–10 years with proper care.

• Habitat:

  • Native to coastal regions of the Indo-Pacific, including Southeast Asia, northern Australia and parts of the Indian Ocean.

  • Commonly found in mangrove forests, estuaries and brackish coastal waters.

  • Can also inhabit freshwater and marine-influenced environments.

  • Naturally lives in areas with submerged roots, vegetation and overhanging branches.

Tank Requirements

• Minimum Tank Size: 75 gallons (284 litres) for juveniles; 125 gallons (473 litres) or larger for adult groups.

• Ideal Temperature: 77–82°F (25–28°C).

• pH Range: 7.0–8.5.

• Specific Gravity: Approximately 1.005–1.015 for a typical brackish setup, adjusted gradually.

• Temperament: Generally peaceful towards suitably sized tankmates but predatory towards smaller fish.

  • Best kept with similarly sized, compatible brackish-water fish.

  • Provide plenty of open swimming space.

  • A tightly fitted aquarium lid is essential because they are capable jumpers.

  • Prefer an aquarium with some open space above the water surface for their natural feeding behaviour.

Diet & Nutrition

Carnivorous – Surface-Feeding Predator

A balanced diet should include:

• Live insects such as crickets, flies and small grasshoppers.

• Mealworms and appropriately sized insect larvae.

• Frozen foods such as bloodworms, brine shrimp and mysis shrimp.

• Small pieces of shrimp, fish and other seafood.

• High-quality carnivorous fish pellets.

Important: Archerfish are famous for shooting precise jets of water at insects above the water surface, knocking them into the water before eating them. Encourage this natural behaviour through suitable feeding enrichment.

Breeding & Spawning

• Egg-layer: Reproduction occurs through external fertilisation.

• Breeding in home aquariums is extremely difficult and rarely achieved.

• Spawning is believed to occur in marine-influenced coastal waters.

• Eggs are released into the water rather than deposited in caves or on surfaces.

• Successful breeding requires specialised environmental conditions and careful fry management.

Appearance

• Body Shape: Deep, laterally compressed body with a pointed head.

• Colour: Silvery-white or metallic silver body.

• Pattern: Several distinctive dark vertical bands extending along the body.

• Eyes: Large, forward-facing eyes that help accurately target prey.

• Mouth: Upturned mouth adapted for catching insects at the water surface.

• Fins: Well-developed dorsal, anal and caudal fins, providing excellent swimming ability.

Distinctive Features

• Famous for its remarkable ability to shoot jets of water at insects.

• Excellent eyesight and highly accurate hunting behaviour.

• Naturally adapted to brackish mangrove and estuarine environments.

• Active swimmer that prefers spacious aquariums.

• Can learn to recognise feeding routines and aquarists.

• Predatory towards smaller fish and invertebrates.

• Requires stable water conditions and appropriate brackish-water management.

• Best suited to larger specialist brackish aquariums.

Special Note: Archerfish are fascinating specialist aquarium fish, particularly because of their unique water-shooting hunting technique. They require a spacious, covered aquarium, suitable brackish conditions and a varied insect-based diet. Toxotes jaculatrix should not be confused with other archerfish species, as adult size and preferred salinity can vary.