Sourceshttps://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=0ahUKEwiAqKnFhffLAhVsApoKHZJtA-sQmhMIhAEwEg&url=http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FPorifera&usg=AFQjCNGhg4bKkiSnnhTZZTfys-xPPgx9NA&bvm=bv.118443451,d.bGs https://www.google.fr/search?q=napol%C3%A9on+poisson&espv=2&biw=1600&bih=755&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiTucnsg_fLAhWEQJoKHUlRDvAQ_AUIBigB