OA single ratfish glides over the cobble bottom at 81 m water depth. Ratfish are related to sharks, rays, and skates, in that their skeletal structure is composed of cartilage instead of bone. Image courtesy of Lewis and Clark 2001, NOAA/OER.
OA single ratfish glides over the cobble bottom at 81 m water depth. Ratfish are related to sharks, rays, and skates, in that their skeletal structure is composed of cartilage instead of bone. Image courtesy of Lewis and Clark 2001, NOAA/OER.