Peacock Flounder

Scuba divers seeking encounters with peacock flounders should direct their attention to sandy patches directly adjacent to coral structures, seagrass beds, and reef rubble fields. Because these flatfish excel at cryptically blending into their environment or burying themselves in sediment, divers should scan the seabed for two small, raised, independently swivelling eye stalks protruding above the sand.

When approaching a peacock flounder, maintain neutral buoyancy and move slowly without kicking up bottom sediment. Fast or aggressive movements will prompt the fish to launch into quick bursts of low-altitude swimming or rapidly shift its camouflage patterns. Avoid touching the substrate near the fish; covering its eyes with sand hinders its visual feedback system, impairing its capacity to adjust skin pigments.

For a memorable encounter, schedule dives during late afternoon or dusk. During these hours, divers may witness courtship rituals, where pairs arch their backs, touch snouts, and perform a synchronized mating rise roughly two metres into the water column before returning swiftly to the seabed.

Peacock flounders reside in tropical and subtropical marine environments where water temperatures remain warm throughout the year. Consequently, dive encounters are possible year-round across their entire geographic range, including the Indo-Pacific, Caribbean, and Western Atlantic regions.

Seasonal reproductive behaviors vary slightly depending on the specific species and region. In the Indo-Pacific (*Bothus mancus*), breeding activity peaks in late winter and early spring, during which females release millions of floating eggs into pelagic currents. In contrast, Atlantic populations (*Bothus lunatus*) are known to spawn continuously throughout the year.

While month-to-month seasonal shifts are minimal for general sightings, daily timing plays a critical role for divers interested in observing specific behaviors. Peacock flounders display peak reproductive activity just before sunset. Late afternoon to dusk dives present the optimum window to observe territorial defense by males, courtship approaches, and the characteristic 15-second spawning rises off the sea floor.

The peacock flounder inhabits warm oceanic waters across two primary geographic regions. *Bothus mancus* spans the tropical Indo-Pacific and warm sectors of the East Pacific, while *Bothus lunatus* is distributed throughout the Western Atlantic—from Florida, Bermuda, and the Bahamas south to Brazil—as well as the Central Atlantic (Ascension Island) and Eastern Atlantic (Gulf of Guinea).

These benthic flatfish are typically associated with shallow coastal marine biomes. They thrive on clear sandy substrates, seagrass meadows, mangrove margins, exposed bedrock, and coral reef flats. While they are most commonly encountered in shallow depth zones between 2 and 20 metres, their depth range extends down to 80 to 100 metres in Atlantic waters, with *Bothus mancus* recorded as deep as 150 metres (490 feet).

Within these habitats, peacock flounders spend the vast majority of their lives resting on or partially submerged within soft sediment. Lying on their unpigmented blind side, they settle into sandy hollows or nestle against coral heads, using the environment both as cover from predators and as a vantage point for hunting.

The peacock flounder is a carnivore and ambush predator, relying heavily on its extraordinary camouflage to catch prey. Small fish constitute the primary portion of its diet—accounting for over 85% of consumed prey items in studied populations—complemented by small crustaceans such as marine shrimp and crabs, as well as octopi and mollusks.

Feeding activity occurs primarily during the day for Atlantic populations, though Indo-Pacific individuals are also active nocturnally. To hunt, the flounder settles onto the seabed, fluttering its fins to cover its body in sand until only its elevated eyes remain exposed. It remains motionless, carefully tracking potential prey items with its independently moving eyes as they approach.

When an unsuspecting fish or crustacean moves within striking distance, the flounder launches forward with a sudden burst of speed, snatching the victim with its large, oblique mouth lined with small, irregular teeth. After capturing prey or escaping threat, the flounder quickly settles back to the bottom, employing gliding fin undulations just above the sediment surface.