Indo-Pacific humpback Humpback Dolphin (Sousa spp.) Adult length: 2.7m (male) Distribution: Coastal waters of Africa, and Asia (see map below and full Adult weight: up to 240kg (male) list of countries in the detailed species account online at: https://wwhandbook.iwc. Newborn: 100cm / 14kg int/en/species/humpback-dolphin)

The base or hump on the Threats: Bycatch, habitat loss Dorsal fin shape can vary, but back under the dorsal fin Habitat: Estuarine, nearshore may take up as much as 1/3 always sits on top of a very Diet: Fish, cuttlefish of the body length broad base, or hump. This hump is more pronounced Dorsal fin shape can vary, but Slightly rounded forehead IUCN Conservation status: in and Atlantic always sits on top of a very broad species base, or hump. This hump is more Indo-Pacific : Vulnerable pronounced in Indian Ocean and Indian Ocean: Endangered Atlantic species Atlantic : Critically Endangered Australian : Vunerable

A long slender beak.

Colour can vary enormously - Indo-Pacific Individual humpback can be recognised by the nicks and scars on humpback calves are born dark grey and can their dorsal fins, through a process called photo-identification. These are -In Broad flippers with become mottled with pink, or almost entirely do-Pacific humpbacks from Malaysian Borneo. (photos courtesy of Sarawak rounded tips pink as adults in some populations. Indian Dolphin Project). Ocean and Atlantic species remain grey.

Indian Ocean and Atlan- Indian Ocean humpback Australian humpback & Atlantic humpback tic humpback dolphins dolphins have a dis- Adult length: 2.8m (male) are all grey and do not Adult weight: up to 280kg (male) have the pink mottling of tinct diagonal dorsal Newborn: 100cm / 14kg Indo-Pacific humpbacks. ‘cape’ visible in this They also have a more photo from northern pronounced hump under Queensland. their dorsal fin. Photo couretesy of Gui- Indian Ocean humpback do Parra. dolphin in Oman: Photo courtesy of Graeme Hornby

Male Atlantic and In- In some populations dian Ocean humpback of Indo-Pacific hump- dolphins can have ex- back dolphins, calves tremely pronounced are born grey, but can Hunpback dolphin distribution. Adapted by Nina Lisowski from Würsig,B., Thewissen, J.G.M. and Kovacs, K.M. humps under their Editors (2018) “Encyclopedia of Marine ”, 3rd ed. Academic Press, Elsevier: San Diego. CA. become increasingly Copyright Elsevier: http://www.elsevier.com dorsal fins, like this mottled until they are Individual from There are four recognised species of humpback dolphins that occur in almost fully pink as Gabon. different parts of the world : the Indo-Pacific humpback dolphin (Sousa adults. Photo Gianna chinensis), the Indian Ocean humpback dolphin (S. plumbea) the Atlantic Photo courtesy of Sar- Minton, WWF humpback dolphin (S. teuszi) and the Australian humpback dolphin (S. sa- awak Dolphin Project Gabon hulensis).