What do the kidneys of a dogfish shark look like?

The kidneys of a dogfish shark, like those of other elasmobranchs, are elongated and flattened, resembling a pair of ribbon-like structures. They are located along the dorsal side of the body, running parallel to the spine. In dogfish sharks, the kidneys are typically dark in color and have a smooth, firm texture. Their structure is adapted for osmoregulation, helping the shark manage salt and water balance in its marine environment.