1500 new sea creatures

Image source, EPA

Image caption, A new species of dolphins in Victoria"s Port Phillip Bay, Australia.

Scientists have found almost 1,500 new creatures in the world's oceans last year.

The World Register of Marine Species has revealed new discoveries such as a hump-backed dolphin and a giant jellyfish that's never been seen before.

Image caption, Black Star Northern Sea Nettle jellyfish at the Horniman Museum, London

The new finds bring the total of known marine species to more than 220,000.

But scientists believe there are up to two million creatures still to be discovered.

Image caption, A moon jellyfish at the Horniman Museum, London