There are a variety of marine life, over 200 with some only found in the waters around Cozumel, including the Toad fish. You will also see plentiful amounts of Queen Angelfish, Moray Eels, Sea Turtles, plenty of vast coral heads and more. It is quite normal to see vast coral heads, sponges, like the Elephant Ear sponge and the Barrel sponge, as well as hundreds of tropical fish, rich ecosystems and steep walls that sink into the abyss due to continuos currents which flow around the island. Tunnels and caves twist through the reef, providing a rich environment for many species.
Surface intervals can be spent looking for indigenous species on the island. Cozumel has a number of endemic species, like the dwarf raccoon(procyon pygmaeus) and the Cozumel wren(nasua nelsoni). The reefs also attract a large amount of migratory birds who feed on the reef. Spotting a brown pelican or olivaceous cormorant can be a treat and are very common on the island.
Reptiles are also indigenous to Cozumel, including the iguana, which is actually a prehistoric reptile and the crocodile. You will also hear and see many other amphibians, including brightly colored tree frogs which use their camoflauge to ward off predators.
Tallies based on entries in Howell and Webb (1995) and Howell (1999).
In the early 1800s, George F. Gaumer was an ornithological collector based in the Yucatán. His collection, much of which new resides at the University of Kansas Museum of Natural History, includes 32 species reported from Cozumel. However, Gaumer is known to have made many errors in labeling this specimens, so many of his localities are now considered to be incorrect. See Parkes (1970).
Total number of breeding bird species recorded: 65
Cozumel has a number of endemic species and subspecies of bird including:
Endemic dwarf mammals are found on the island:
Endemic marine life: