Long Tom

For Australian native fish enthusiasts and collectors of rare aquarium species, the Long Tom is a truly exceptional addition. Rarely available in the aquarium trade, this unique fish is considered one of Australia's most sought-after native species.

The Long Tom is a fascinating freshwater to brackish water predator recognised for its incredibly long, slender body and distinctive needle-like jaws. Fast, graceful, and always alert, this unique species makes an impressive display fish for larger aquariums. Long Toms are surface-dwelling hunters that prefer open swimming space and thrive in well-maintained aquariums with secure lids, as they are excellent jumpers.

Their streamlined appearance and active nature make them a favourite among experienced fishkeepers looking for an unusual centrepiece species.

 

Features of the Long Tom

• Long, streamlined body with an elongated beak-like mouth
• Surface-dwelling predator with graceful swimming behaviour
• Silver to olive-green colouration with an iridescent sheen
• Active and intelligent fish that enjoys open swimming space
• Best suited to larger aquariums
• Excellent display fish for experienced aquarists

Recommended Aquarium Size

A minimum aquarium size of 300 litres is recommended for juvenile Long Toms, with larger aquariums preferred as they mature. Their active swimming behaviour means they require plenty of open water and a long aquarium footprint.

A tight-fitting lid is essential, as Long Toms are powerful jumpers and can easily leap from uncovered tanks.

Tank Mate Compatibility

Long Toms are generally peaceful towards fish too large to be eaten but will consume smaller fish that fit into their mouths. They are best kept with similarly sized, peaceful species.

Suitable tank mates include:

• Silver Dollars
• Larger Rainbowfish
• Severums
• Geophagus
• Larger Gouramis
• Peaceful Catfish
• Datnoids
• Larger Loaches

Avoid keeping them with small community fish such as Neon Tetras, Guppies, or other species that may be viewed as prey.

Feeding

Long Toms are carnivorous predators that naturally feed on insects, small fish, and aquatic invertebrates.

A varied diet should include:

• Frozen prawns
• Whitebait
• Bloodworms
• Blackworms
• Live insects (where appropriate)
• High-quality carnivore pellets (for trained specimens)

Many captive Long Toms can be successfully trained to accept frozen foods and prepared diets, reducing the need for live feeders.

Aquarium Setup

Filtration

Long Toms appreciate clean, well-oxygenated water with moderate water movement. A high-quality filtration system is recommended to maintain stable water quality, especially as they grow.

Plants

Live plants can be used around the edges of the aquarium to provide shelter while leaving plenty of open swimming space near the surface. Floating plants can also help reduce stress by diffusing bright lighting.

Decorations

Use driftwood, rocks, and larger decorations to create natural hiding areas while ensuring there is ample unobstructed swimming room. Avoid overcrowding the aquarium with ornaments.

Lighting

Moderate lighting is ideal. Long Toms are often more confident in aquariums with subdued lighting or floating plants that provide shaded areas.

Substrate

Sand or fine gravel is recommended. While Long Toms spend most of their time near the surface, a natural-looking substrate enhances the overall appearance of the aquarium.