The clown fish protects the anemone from other fish that would eat it, while the anemone's stinging tentacles keep the clown fish's predators away.

What do a carnivorous sponge, a lobular yam and a flat-faced psychedelic frogfish all have in common?

Faye Archell, or the Centre of Applied Zoologym said: 'Many species of Angler Fish are what are known as ambush predators.