Below at the top is the Spotted tun, Tonna dolium, also know as Tonna tessellata. It is found in the Indo-Pacific in deep water where it feeds on fish, sea urchins and crustaceans. It is 8 - 12 cm long.
Above is the Textile nerite, Nerita textilis. It is found in the Indian Ocean and Red Sea among rocks in the intertidal zone. It grows up to 5 cm long.Distorsio anus, the Distorted anus, below has a rather unfortunate common name. It is found in the Indo-Western Pacific in shallow waters under coral where it eats echinoderms.