On of the biggest dangers to the Great Barrier Reef are the thorny starfish which multiply in huge numbers and crunch their way through the living corals. Few creatures will eat them as they are quite poisonous.
The clown fish lives among the tentacles of large sea anemones. This brightly colored fish is immune to the anemone’s stinging tentacles. It helps to attract other fish that the anemone catches and eats. So the clown fish is in safety and isn’t hungry.