Most corals obtain nutrients from photosynthetic algae that live within the coral’s tissue. That also means that they have to live within 200ft/60m of the surface. Well, not this species, also known as the harp sponge. It was discovered in 2000 off the coast of California, but only confirmed to be carnivorous this year. Shaped somewhat like a candelabra to increase its surface area, it traps tiny crustaceans with tiny Velcro-like hooks and then spreads a membrane over it, slowly digesting it with chemicals. As if that wasn’t weird enough, it reproduces using “sperm packets” – see those balls at the top of each branch? Yes, those are packets of spermatophores, and every now and then they float away to find another sponge and reproduce.