IN PICS| Eight marine animals which have become extinct

Steller's Sea Cow: It was discovered in 1791 in the Bering Sea off Alaska’s coast. It got extinct in 18th century as its fat and meat were very high

Japanese Sea lion: It was an aquatic mammal that became extinct in the 1970s.They were hunted commercially in the 1900s, leading to their extinction

Sea Mink: It became extinct in the late 19th or early 20th century. The unregulated fur trade eventually led to its extinction

The Great Auk: It became extinct in 1840s. It was hunted mainly for its meat, oils, eggs and feathers

Caribbean Monk Seal: The last confirmed sighting of this species was in 1952 at Serranilla Bank, between Jamaica and Nicaragua

Eelgrass Limpet: This species lived in the western Atlantic Ocean. It was quite common until the late 1920s, before its extinction

New Zealand grayling: As the name suggests, this species was found in New Zealand. It possibly became extinct in early 20th century

Megalodon: It lived approximately 23 to 3.6 million years ago. It was regarded as one of the largest and most powerful predators to have ever lived