FRESHWATER FROGFISH (Antennarius biocellatus) – Brackish (Approx. SG 1.005)

A Rare Brackish Anglerfish with Incredible Camouflage

The Freshwater Frogfish (Antennarius biocellatus), more accurately known as the Brackish Frogfish, is one of the most unusual and fascinating predatory fish available in the aquarium hobby. Despite its common name, this species is not a true freshwater fish and thrives best in lightly brackish water, typically around a specific gravity (SG) of 1.005.

Famous for its exceptional camouflage, this rare anglerfish can closely resemble algae, sponges, rocks, or aquatic plants. Rather than actively chasing prey, it uses a specialized lure (called an illicium) located above its mouth to attract unsuspecting fish and crustaceans before striking with incredible speed. This unique hunting behaviour makes it one of the most captivating display fish for experienced aquarists.

Native to mangrove estuaries and coastal brackish habitats throughout the Indo-Pacific region, Antennarius biocellatus is best maintained in a species-focused aquarium with stable brackish water conditions and minimal competition.

Monster Aquarium Canada proudly offers healthy Freshwater Frogfish with professional live fish shipping across Canada.

Care Requirements

Aquarium Size

A minimum 30-gallon aquarium is recommended for a single specimen. Larger aquariums with gentle water movement, stable brackish conditions, and plenty of live rock, driftwood, or artificial structures provide ideal habitat.

Water Parameters

• Scientific Name: Antennarius biocellatus
• Common Name: Freshwater Frogfish, Brackish Frogfish
• Adult Size: 4–6 inches (10–15 cm)
• Temperature: 24–28°C (75–82°F)
• Specific Gravity: 1.003–1.008 (Ideal around 1.005)
• pH: 7.5–8.2
• Water Hardness: Moderate to Hard
• Care Level: Advanced
• Temperament: Solitary Predator
• Diet: Carnivore
• Origin: Indo-Pacific Brackish Estuaries
• Lifespan: 5–8 years with proper care

Diet

Freshwater Frogfish feed on meaty foods such as marine shrimp, silversides, lancefish, squid, mollusks, and other appropriately sized aquatic prey. Many specimens can be trained to accept thawed frozen foods using feeding tongs. Avoid relying on live feeder fish, as they may introduce parasites and provide poor nutrition.

Compatible Tank Mates

The Freshwater Frogfish is best kept alone or with very carefully selected tank mates that are neither small enough to become prey nor aggressive enough to harass it.

Suitable companions may include:

• Larger Brackish Archerfish
• Larger Monodactylus (Monos)
• Adult Scats (in appropriately sized aquariums)

Compatibility should always be approached with caution. Any fish small enough to fit into the frogfish’s mouth will likely be eaten, while aggressive fish may stress or injure it.

Why Buy Freshwater Frogfish from Monster Aquarium Canada?

Healthy Rare Specimens

Our Freshwater Frogfish are carefully selected for excellent health, feeding response, and overall condition before shipping.

Secure Live Fish Shipping Across Canada

Monster Aquarium Canada professionally packs every fish using proven live fish shipping methods to help ensure safe delivery throughout Canada.

An Extraordinary Display Fish

With its remarkable camouflage, lure-assisted hunting technique, and unusual appearance, the Freshwater Frogfish is an exceptional choice for advanced aquarists seeking a truly unique brackish species.

Frequently Asked Questions

1. Is the Freshwater Frogfish truly a freshwater fish?

No. Despite its common name, Antennarius biocellatus is a brackish-water species that should be maintained in lightly brackish conditions, typically around SG 1.005, for long-term health.

2. How large does the Freshwater Frogfish grow?

Adult specimens generally reach 4 to 6 inches, depending on diet and husbandry.

3. What does the Freshwater Frogfish eat?

They require a carnivorous diet of shrimp, fish, squid, mollusks, and other meaty aquatic foods. Many can be trained to eat frozen foods.

4. Can Freshwater Frogfish live with other fish?

Only with great care. They are ambush predators and will consume fish or invertebrates that fit into their mouths. Species-only aquariums are often the safest option.

5. Does Monster Aquarium Canada ship Freshwater Frogfish across Canada?

Yes. Monster Aquarium Canada provides professional live fish shipping across Canada with secure packaging to help ensure your frogfish arrives healthy and ready for acclimation.