Warty Frogfish

Geographic Origin and Biotope: Indo-Pacific Ocean (Mauritius, Indonesia, Philippines, up to the Solomons). Strictly MARINE. Stations camouflaged on coral reefs, among coral branches or in sponges, preferably in protected coastal waters and lagoons.

Taxonomy and Morphology: Warty Frogfish (Antennarius maculatus). Masterpiece of camouflage. Lacks scales, with wrinkled skin and appendages ("warts") to blend in with sponges and corals. The pectoral fins are modified into claws to "walk" on the bottom.

Social Behavior: Formidable ambush predator. Solitary. Motionless for hours or days, moves its "illicium" (worm-like cranial lure) to attract fish. If disturbed it inflates with water; can walk instead of swimming.

Coloration and Sexual Dimorphism: Perfect camouflage: varies from bright yellow, to orange, red, white, sprinkled with brown or scarlet spots that simulate sponge encrustations. No externally identifiable sexual dimorphism.

Aquarium Setup: Requires mature marine tanks (Reef or dedicated aquarium). Moderate water current. Needs living or synthetic structures (soft or fake corals) among which to anchor itself. Not being an active swimmer, huge horizontal tank space is not needed.

Diet and Feeding: Carnivorous predator. In nature it swallows fish or crustaceans almost as long as itself in milliseconds. In the aquarium feed it only twice a week with live shrimp, small fish (e.g. adapted guppies or mollies) and slowly accustom it to thawed shrimp with tweezers.

Water Quality: Impeccable tropical marine water: salinity 1.023-1.025 sg, zero nitrites and ammonia. Lacking true scales, it is intolerant to toxic spikes and to the indiscriminate use of copper for medical treatments.

Compatibility and Tankmates: Incompatible with fish smaller than itself: they would all be eaten. Incompatible with "nipping" fish (Triggerfish, Pufferfish) that would try to bite its lure or "warts". Best kept alone or with very large, calm fish.

Aquarium Reproduction: Extremely rare in captivity. Females secrete a gigantic "raft" or gelatinous ribbon (egg ribbon) containing tens of thousands of eggs, released into the water column. The larvae are pelagic before settling to the bottom.

Risks and Diseases: They often die for two reasons in captivity: overfeeding (undigested food rots in the stomach if fed too often) and exposure to air. If it swallows air during a transfer, it will not be able to expel it and will float to death.