Indo-pacific Bottlenose Dolphin

Overview

The Indo-Pacific bottlenose dolphin is a highly social marine mammal found throughout the warm temperate and tropical coastal waters of the Indian and western Pacific Oceans. These intelligent animals are frequently observed in nearshore environments, including bays and estuaries, where they navigate and forage using sophisticated echolocation.

Distribution & habitat

This species is primarily a coastal inhabitant, favoring shallow waters often less than 50 meters deep. Its range extends from the eastern coast of Africa and the Red Sea across the Indian Ocean to Southeast Asia and northern Australia.

Appearance

Generally smaller than the common bottlenose dolphin, this species features a proportionately longer rostrum and a streamlined, fusiform body. Adults are typically dark grey on the back, fading to a lighter grey or white on the belly, which often develops distinct dark grey spotting as the animal ages. They possess a prominent, curved dorsal fin and a high tooth count, typically ranging from 23 to 29 teeth on each side of both jaws.

Biology & behavior

Indo-Pacific bottlenose dolphins live in complex, often sexually segregated societies, typically moving in small pods of 5 to 15 individuals, though they may occasionally aggregate in groups exceeding 100. They communicate and maintain social bonds through a variety of sounds, including unique "signature whistles" that act as individual identifiers. Calves remain dependent on their mothers for several years, with individuals capable of living over 50 years.

Feeding

As opportunistic carnivores, these dolphins feed on a diverse array of prey, primarily targeting various fish and cephalopods like squid and octopus. They utilize echolocation clicks to detect and track prey in their coastal habitats.