The diver explores the colourful underwater world with his scuba tank.In the process, he discovers a nurse shark.After the initial shock, he relaxes and observes the fish from some distance.Nurse sharks are rather sluggish and only dangerous if you really provoke them.They have barbells on their lower jaw, which are similar to the whiskers of a cat.The shark uses them to sense scents in the water and detect prey.Its favourite food is sea urchins, lobsters, and crabs, which it "sucks" out of rocky crevices with its big mouth.