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	The Bottlenose Dolphin is a large, robust animal with a slightly hooked broad dorsal fin. Size and some physical characteristics vary according to the distribution of each individual. In smaller forms, the well-known bottle-shaped beak is shorter and slender. It broadens as the body size increases. In some populations the melon is more rounded. Body colour also varies; the dorsal cape ranges from dark blue to brown-grey, fading to a pale grey along the flanks. The ventral surface is white-pink, and the tip of the snout is normally white. Tail flukes and the flippers' edges are grey-black.  Some populations are spotted, or a dark grey-black. The Bottlenose Dolphin measures between 1.9m and 4m, weighing 90-650kg.
The Bottlenose Dolphin cannot really be confused with other species - for instance, the spotted variety is more bulky in appearance than other mottled species, such as the Pantropical and Atlantic Spotted Dolphins. In coastal waters, the size and shape of the dorsal fin should be enough to distinguish between the Bottlenose Dolphin and other local species, such as the Tuxuci, which has a more triangular fin. They are both a coastal and oceanic species, with the former preferring waters of less than 30m in depth. The habitats they occupy is diverse, ranging from rocky reefs to calm lagoons and open waters. Bottlenose Dolphins tend to prefer shoaling and bottom-dwelling species, feasting upon a wide variety of fish, squid and octopi.  They have been reported individually, in groups of between 10-100 inshore and units of several hundred offshore. They are powerful swimmers and acrobatic in nature, often bowriding and leaping alongside vessels.