Indo-pacific Humpback Dolphin

Overview

The Indo-Pacific Humpback Dolphin is a coastal cetacean found in the warm, shallow waters of the eastern Indian and western Pacific Oceans. Often referred to as the Chinese white dolphin, this species is frequently observed in estuaries, mangrove forests, and near river mouths where it plays a significant role in local coastal ecosystems.

Distribution & habitat

These dolphins inhabit tropical and subtropical regions, typically remaining in waters shallower than 25 meters. They are commonly found along the coasts of Southeast Asia, China, and Australia, showing a strong preference for estuarine environments and areas with high biological productivity. They generally avoid deep oceanic waters, preferring the sheltered conditions of bays and reefs.

Appearance

This species is characterized by a robust, stocky body and a long, well-defined beak. Their coloration is highly variable across their range, appearing in shades of white, pink, or grey. In some populations, individuals develop a distinct hump or ridge on their back, which supports a short, wide-based dorsal fin.

Biology & behavior

Indo-Pacific Humpback Dolphins are moderately acrobatic but rarely engage in bow-riding. They are social animals that may associate with other marine mammals, such as bottlenose dolphins, and occasionally follow fishing trawlers to forage. They are acoustically active and sensitive to their environment, often navigating complex estuarine soundscapes.

Feeding

Their diet consists primarily of nearshore, estuarine, and reef-associated fish. In some regions, they also consume cephalopods. Their foraging success is closely linked to the availability of prey, which can be influenced by local environmental factors like nutrient levels and fishing pressure.