Peacock Flounder

The peacock flounder is a species of lefteye flounder in the family Bothidae, found throughout the tropical and subtropical western Atlantic, Caribbean, and Gulf of Mexico. Like other Bothidae, adults undergo a dramatic metamorphosis: they hatch with an eye on each side of the head, and one eye migrates over the top of the skull so both eyes end up on the left side of the body as the fish tips onto its right side to lie on the seafloor. Peacock flounders are demersal, spending most of their time resting on sand, seagrass, or rubble near coral reefs. They are best known among divers and snorkelers for their striking ability to alter both color pattern and skin brightness within seconds to match the surrounding substrate.

• Flat, diamond-shaped body with both eyes on the upper (left) side of the head
• Base color ranges from pale sandy tan to olive-brown, overlaid with dozens of small electric-blue rings and spots
• Rings and spots can fade or intensify within seconds as the fish matches its background
• A dark blotch is usually visible near the middle of the lateral line
• Undulating dorsal and anal fins run nearly the full length of the body
• Adults reach 20-45 cm in length

The blue-ringed pattern distinguishes it from the similar flowery flounder (Bothus mancus), whose rings are smaller and more numerous, and from plain sand-dwelling soles, which lack ocellated spots entirely.

Peacock flounders inhabit shallow, warm coastal waters of the tropical western Atlantic, Caribbean Sea, Gulf of Mexico, and Bermuda, typically from the surface down to about 20 meters. They favor sandy patches, seagrass beds, and rubble adjacent to coral reefs, where their mottled coloration provides effective camouflage. The species tolerates a range of substrates but is rarely found far from reef structure or seagrass cover. Water temperatures in its range generally stay warm year-round, and juveniles often settle in shallower nearshore flats before moving to slightly deeper reef-adjacent habitat as they mature.

Peacock flounders are solitary, bottom-dwelling ambush predators that spend much of the day partially buried in sand with only their eyes protruding, watching for passing prey. They feed mainly on small fish, shrimp, and crabs, lunging suddenly to capture prey that ventures too close. Their most notable behavior is rapid physiological color change, achieved through specialized skin cells called chromatophores, allowing them to blend with sand, rubble, or seagrass within seconds. They can also swim short distances in a graceful, undulating motion when disturbed. Spawning occurs in open water, where eggs and newly hatched larvae are pelagic before settling and metamorphosing into the flattened adult form.