what is the function of a sharks liver
Shark liver oil Many fish maintain buoyancy with swim bladders. However sharks lack swim bladders, and maintain their buoyancy instead with large livers that are full of oil.[10] This stored oil may also function as a nutrient when food is scarce.[11] Deep sea sharks are usually targeted for their oil, because the livers of these species can account for up to 5-10% of their total weight.[1]