Red Wolf Fish

The red wolf fish, also known as the rainbow wolf fish, is a predatory species from South America with a wide distribution across Peru, French Guiana, Venezuela, Trinidad, and Brazil. Juveniles from certain localities exhibit a remarkable mimicry of female killifish colour patterns to ambush unsuspecting males. Adults reach approximately 20 cm (8 inches) and develop a striking red-orange hue on the belly and fins, especially in the Peruvian variant, though the species may represent a complex of closely related forms.

Despite its modest size, the red wolf fish is a voracious predator with sharp teeth and should not be trusted with any fish small enough to fit in its mouth. It is best maintained singly in a heavily-planted aquarium with floating vegetation. Conspecifics may fight lethally; similarly sized tankmates are a specialist option in a larger aquarium, while smaller fish are prey. A tightly-sealing cover is essential — this fish is an accomplished escape artist, possessing a modified swim bladder that allows it to breathe atmospheric air and even travel short distances over land. A tank with base dimensions of 120 cm x 30 cm (approximately 108 litres) is the minimum for a single adult.

Water parameters should be 22-26°C, pH 5.5-7.5, with soft to moderate hardness. The diet must be meaty: earthworms, prawns, mussels, lancefish, and sinking carnivore pellets (if accepted) — dried foods are often refused. The red wolf fish is strictly for specialist keepers who can provide the space, water quality, and dietary regime this remarkable predator requires. Its secretive nature, intense feeding response, and unusual respiratory adaptation make it one of the most fascinating oddball species available to the dedicated aquarist.