Strange, unimaginable things growing on top of

Electric probe. Some fish develop a large nose, are quite like a beak, and use them as electrical sensing organs. Goblin sharks and spotted sturgeon are two examples of this type. These species often live in dark conditions so they use 'noses' to search for enemies, by sensing the electrical impulses emitted by the prey.

Black dot hole . The hammerhead shark is a typical species of possessing an electric receptor in the form of these black dots. They know how to use this organ to feel the enemy's electric fields and body temperature, even when they hide under sand. Many evidence has demonstrated that this receptor system can be used to locate.

Hump. This tumor usually only appears on the head of male fish of the cichlid ornamental fish during mating. They rarely appear on the head of a female, and if they are, they are usually smaller. Many people think that these tumors appear to attract partners or store fat.

'Excess fins'. The pressed fish has a part near the head, which looks very similar to the fin. They use this part to cling to big fish. They even rely on these fish for food, while still hunching on them.

Sword. The sword tip can use the sword as a tool to attack the enemy, while helping the fish with this nose swim faster due to the advantages of hydraulics.

Artificial luminescent 'fishing rod'. The angerfish has a part that grows over the head, looking like a spine. They use this part to attract prey to attack and attack. In the dark, this 'fishing rod' can also be luminescent so that they can hunt prey most effectively.

Beard. Alum fish (Goat fish), unlike other fish, use beards to sense the electrical impulses emitted by the prey, using whiskers growing under their chin to dig sand, seeking enemies.

Kype. These strange, hooked upper jaws called this kype appear in male salmon, after they reach the breeding ground. The use of hook functions is to attack other males and to impress females.

Textured nodules. On the head of the male Stoneroller and Bluehaed Chubs fish often appear nodules when they reach the breeding season and fall off when the breeding season is over. Just like kype, these nodules are used to show strength to women, or to attack opponents. Many of these fish and nodules grow in the anal fin, supposedly helping them dig and create an appropriate spawning area.

Head fins . Stingray uses the fins to spread plankton-rich waters into the mouth.