Peacock Bass: ID, Florida Range and State Record

The mark that settles it is the tail: a black spot ringed with a yellow-gold halo on the caudal fin, which is what the species name ocellaris refers to and which no native Florida gamefish has.

The overall build resembles a largemouth bass, which is where the common name comes from, but the colour does not. Florida FWC describes the body as golden with three black vertical bars that tend to fade in older fish. Breeding adults show strong orange and red on the belly and fins, and males develop a pronounced hump on the forehead.

Working checklist:

• Gold-haloed black eyespot on the tail fin
• Three dark vertical bars, strongest on young fish
• Golden to olive body, often with red or orange on the lower body and fins
• A cichlid profile — one continuous dorsal fin with a spiny front and soft rear section

Despite the name it is a cichlid, related to the oscar rather than to largemouth or smallmouth bass. USGS notes that five species of Cichla are currently recognised and that fish labelled Cichla ocellaris by state agencies may in some cases be other species or hybrids, so the genus is easier to be sure of than the species. Photograph it and the app identifies it if you want a name from a catch photo.

This is a deliberate, managed introduction rather than a dumped aquarium fish. Florida FWC introduced butterfly peacock bass in 1984 into large coastal canals in southeast Florida. USGS records earlier Florida releases going back to 1964, when about 10,000 juveniles were released in the Fort Lauderdale area, with established populations dating from the 1984 programme.

The purpose was twofold: create a warm-water sport fishery in canals that had little to offer anglers, and put a predator into systems already full of introduced fish. FWC reports the result worked — peacock bass reduced populations of unwanted exotic fish, particularly spotted tilapia.

USGS lists the species as established in south Florida, Hawaii, Guam and Puerto Rico, with a Texas population from 1978 to 1992 that was extirpated, and scattered later records from Arizona, Maryland and Louisiana. USGS describes the broader impacts as largely unknown, with evidence of predation on native fishes and potential competition with largemouth bass.

Peacock bass are a tropical fish and the temperature limit is hard. FWC states they cannot tolerate water temperatures below 60F, or salinity greater than 18 parts per thousand, which restricts them to coastal Miami-Dade and Broward counties.

That is why the fishery is where it is, and why the species has not spread up the peninsula despite being in Florida for decades. A cold winter knocks back the northern edge of the population.

The habitat they do use is specific: warm, slow-flowing canals, ponds, lakes and deep rock pits. USGS notes that temperature limitations restrict northern expansion generally, which is the same brake that holds oscars and other South American cichlids in the south of the state.

Growth is fast at the start. FWC reports peacock bass reaching 12 to 14 inches in their first 16 to 18 months. USGS gives a maximum of 70 cm total length for the species.

The Florida state record stands at 9.11 pounds, and FWC notes fish up to 12 pounds have been caught, with the largest unofficial catch at 12 pounds and 25.5 inches.

They feed almost exclusively on fish, using speed to run prey down, and they hunt by sight during daylight. That is the practical key to catching them: peacock bass are a daytime, sight-feeding fish, unlike largemouth bass which often feed best at dawn and dusk.

The bag limit is two fish per day with only one over 17 inches, a structure designed to protect the larger breeding fish. Check current FWC regulations before fishing, since limits and any special zone rules can change.

Peacock bass spawn from April through September with a peak in May and June, on cleaned hard surfaces in shallow water. FWC gives 4,000 to 10,000 eggs per nest.

Both parents guard, and they keep it up for months after hatching — FWC notes both parents are occasionally seen shepherding hundreds of young. A guarded school of fry with two adults hovering nearby is a normal sight in a south Florida canal in late spring.

That parental care is worth respecting on the water. A pair on a nest is easy to catch because they attack anything that comes near, and removing them exposes the brood. If you find fish clearly guarding young, move on and fish elsewhere.