The Irrawaddy Dolphin is an endangered mammal from the family Delphinidae. It's scientific name is Orcaella brevirostris.

Irrawaddy Dolphins are greyish blue in colour with rounded heads, short stub noses and 12 to 19 teeth on either side of both jaws. They have small, triangular dorsal fins and paddle-like, triangular pectoral fins. These mammals weigh from 89.8 up to 199.5 kilograms and are around 179.8 to 274.32 centimetres in length.

They live in lakes, rivers, estuaries and ocean coasts in south and southeast Asia. Although they live in all different lakes, rivers and ocean coasts in south and southeast Asia, they mainly live in the Ayeyarwady, Mahakam and Mekong rivers.

Squid, octopus, crustaceans, cephalopods and a range of fish are amongst some of the foods that the Irrawaddy dolphin eats. Irrawaddy dolphins are carnivores, meaning that they eat meat. They are cooperative hunters, this means that they work together to hunt and catch their prey. To lure in their food (specifically fish), they spit water occasionally, this helps to herd the fish and other animals that are to be there meal. Irrawaddy dolphins aren't picky eaters, so they will eat whatever fish or sea-creatures they can find.

The Irrawaddy dolphin reproduces every 3 years, and only has one calf each time. Its reproduction season is from December to June. The gestation period for an Irrawaddy dolphin is 9 to 14 months. At birth, a calf is approximately 1 metre in length and weighs 10 kilograms. They live for approximately 30 to 50 years.

There are only approximately 92 individuals left in the wild. The threats that they face are pollution, habitat loss, destruction of habitat and injuries from accidental catches. It's predators are sharks and human beings.

Irrawaddy dolphins are related to killer whales!!