Book review of Nature\'s I.Q. (Evolution)

by David Turell , Thursday, August 20, 2009, 20:18 (5372 days ago) @ David Turell

Another example of symbiotic instinctive partnership. The clown fish, think 'Finding Nemo' of the movies, lives inside a sea anemone. The latter is a cylindrical sack of a simple animal that attaches to the bottom. It has a ring of very poisonous tenticles at its mouth at its top. The adult clowns can live inside the tentacles without difficult, because it is surrounded by a gelatin layer. The young clown fish do not have this layer but develop it by allowing themselves to be stung a little. Without that layer they are killed instantly if heavily stung. When they have the gelatin layer then they enter. The clown fish by stirring the water brings food to the anemone and protects it from its enemy, butterfly fish. The clown fish benefit by being protected from their predators. Everybody wins but the predators. - Can anyone tell me how this developed in evolution? I can't think of a way.