A baby pygmy hippopotamus at Melbourne Zoo in Australia is about to make the plunge into the deep, main pool after a successful set of swimming lessons with his mum Petre.
Obi was welcomed into the world in late May/ early June and was the first male calf to be born at the zoo since 1981.
The pygmy hippopotamus is an endangered species under threat of illegal poaching and severe habitat loss when in the wild.
Obi is only expected to grow to about 70-80 centimetres tall, and weigh about 250 kilograms- a quarter of the height and weight of a full sized hippo.
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