Remora is a genus of remoras native to temperate to tropical marine waters worldwide. Gobies, remoras and lumpsuckers have suckers which are modified fins. The cobia resembles its close relatives, the remoras of the family Echeneidae. Some cultures use remoras to catch turtles. In remoras the sucker is a modified dorsal fin. Adults are sometimes accompanied by remoras or trevallies. Some remoras associate with specific host species. Also, Gobies' pelvic fins are fused to form a sucker, similar to Remoras. Some remoras associate primarily with specific host species. "The Remoras", "Aeon's Child", and a short story also named "Marrow". Remoras eat leftover food from the shark. Remoras can be caught as fishing bycatch and put in aquaria. Remoras, like many other fishes, have two different modes of ventilation. Remoras are a family ("Echeneidae") of ray-finned fish. Remoras sometimes attach to small boats, and have been observed attaching to divers as well.