In insect-like larvae, it will extend its tentacles to achieve the adsorption of marine life. At this time, the adsorption force is still weak, but when it grows slowly, it will form a shell-like larva. At this time, it will secrete a special viscous liquid to increase its adhesion to marine life and connect it with marine life without any gap. When it becomes a complete body, the adsorption force is the strongest and it is firm. When it becomes a complete body, it is difficult to separate it.
Barnacles are usually attached to the bodies of turtles and whales. Because the turtle's shell is rough, the turtle's moving speed is very slow, which is conducive to the barnacles firmly attached to its surface. Similarly, the whale moves slowly, so it will also be parasitic on the whale's body surface. Barnacles absorb floating creatures in the sea through turtles and whales swimming in the sea, which is beneficial to their survival. At the same time, it can also be attached to the hull and rocks, because the surfaces of the hull and rocks are very rough, and it is not allowed to fall off when attached to them.
However, if there are too many barnacles on the surface of turtles and whales, it will also have a negative impact on marine life, while barnacles attached to the hull and rocks will affect the operation of the hull and the fishermen's health. Even so, barnacles have a good side. Their medicinal and edible values are also high, and they are also very popular with people. They can treat some diseases in people's bodies, such as stomachache, acid swallowing, fire and water burns and so on. As a kind of food, barnacles are rich in protein, which is a good food.