Shark

Sharks are cartilaginous fish belonging to the subclass Elasmobranchii. They possess streamlined bodies, multiple rows of teeth, and skeletons made of cartilage. Sharks are widely distributed throughout the world's oceans, from shallow waters to the deep sea. They are carnivores, with diets including fish, seals, sea turtles, cephalopods, and even other sharks. Sharks occupy apex or near-apex positions in marine food webs, playing a vital role in maintaining ocean ecosystem balance. Despite their fearsome reputation, most shark species pose little threat to humans.