Nudibranchs are carnivores grazing on algae, anemones, barnacles, corals, sponges and also on other nudibranchs. The two highly sensitive tentacles, called rhinophores, on the top of their head locate their prey. The alluring colours of nudibranchs come from the colouring of the food they eat. Some nudis retain foul-tasting poisons of their prey and then secrete them as a defense against predators.
