Caribbean Reef Shark

The Caribbean Reef Shark (Carcharhinus perezi) is a robust requiem shark and the most frequently encountered large shark species on coral reefs throughout the Caribbean Sea, Gulf of Mexico, and adjacent western Atlantic waters. As a dominant reef-associated predator, it plays a key ecological role in maintaining fish community structure and is a major draw for dive tourism at shark-feeding sites throughout the region. Unusually among requiem sharks, it is capable of lying motionless on the sea floor and pumping water over its gills through buccal muscles rather than needing to swim continuously. It is classified as Endangered due to fishing pressure across much of its range.

Key field marks:

• Stocky, gray to gray-brown body with a whitish belly
• Broad, rounded snout, relatively small eyes
• Dark-tipped or dusky margins on the second dorsal fin and lower caudal lobe
• No obvious interdorsal ridge, distinguishing it from the Dusky Shark
• Large first dorsal fin, moderately falcate pectoral fins

Its stocky build, resting behavior on reef ledges, and Caribbean-only distribution help distinguish it from similar-looking Atlantic requiem sharks such as the Dusky or Silky Shark.

Found along coral reefs, reef walls, and adjacent sandy or grassy habitats throughout the Caribbean Sea, Bahamas, Gulf of Mexico, and southeastern United States down to Brazil. Typically inhabits depths from the surface to about 30 m, though it can range deeper along reef drop-offs to at least 380 m. Strongly associated with healthy coral reef ecosystems and often found resting in caves or under ledges during the day.

Caribbean Reef Sharks are among the few shark species regularly observed resting motionless on the sea floor, using buccal pumping to ventilate their gills without swimming, often congregating in small groups in caves or under ledges by day. They become more active at dusk and night, hunting bony fish and occasionally rays and other sharks over the reef. Reproduction is viviparous, with litters of 4-6 pups born after a roughly year-long gestation in shallow nursery areas. As a locally dominant reef predator, they help regulate mesopredator and prey fish populations, and their reliable presence at popular dive sites has made them economically valuable for ecotourism.