The anglerfish is a unique deep-sea fish known for its distinctive appearance and hunting method. It has a bioluminescent lure on its head, which it uses to attract prey in the dark depths of the ocean. This lure is a modified dorsal fin that emits light, making it easier for the anglerfish to catch small fish and other creatures. There are over 200 species of anglerfish, and they can be found in various ocean depths, from shallow waters to the deep sea. Some species exhibit sexual dimorphism, where females are significantly larger than males. The males often attach themselves to females for reproduction, highlighting the anglerfish's unusual mating habits.