Shark specialists estimate that 100 million sharks are killed for their fins annually. Shark finning is widespread and largely unmanaged and unmonitored. The depletion of shark populations threatens the stability of marine ecosystems.
A tiny amphipod perches on the pink sponge Dendrilla rosea. The underwater walls are a blaze of colour at the Poor Knights Islands in New Zealand.
Om nom nom nom
The nudibranch Flabellina albomarginata munching away on its hydroid food at the Poor Knights Islands.
Cave diver Cameron Russo enjoys a spectacular wedding cake speleothem formation in cave system Dos Ojos in Mexico.