Sea anemones

Sea anemones are marine animals that live in tropical and subtropical waters around the world. They are shaped like a flower and often come in bright colors. Sea anemones are predators and feed on plankton, small crustaceans and other marine animals.

Sea anemones have many species, some of which are poisonous to humans. However, most species are not dangerous to humans if left alone. However, sea anemones can be dangerous to other marine animals such as fish and shellfish.

Although sea anemones are dangerous to humans, they play an important role in the ocean ecosystem. They destroy plankton and small crustaceans, which are the main source of food for many other marine animals. In addition, sea anemones provide shelter for many marine animals, which use them as shelter from predators.

However, due to their beauty and popularity among aquarists, sea anemones have become a target for poachers. Many sea anemone species are endangered due to overfishing and environmental pollution. Therefore, it is important to preserve and protect these unique marine animals.

**Sea anemones (Actiniaridae)** are a genus of marine coelenterates of the coelenterate type, which includes 22 species of sea anemones that live in all oceans of the world.

Sea anemone cells are disc-shaped, dense, with 8-16 evenly spaced tentacles around the mouth and 3-7 or more radially spaced radial tentacles. The anemone's disk has folds that form a pharynx and holes leading to sensory organs - stinging cells. More often there is an anemone with 8 tentacles, surrounded on the side of the body by transverse partitions. The inner side of the tentacles is covered with stinging cells. Part of the ray tentacles bears plates, outgrowths, and cilia that are capable of perceiving mechanical irritations and detecting the power of illumination at a distance. In sea anemones, they ensure the regeneration of lost small tentacles, restoring new ones in their place. With their color, sea anemones imitate various objects and creatures, moving among them, attracting prey, which forms a cloud, facilitating the consumption of food and protection from predators. During the day, sea anemones are usually attached to the bottom or fixed by another creature. In case of danger, the stinging cells of the sea anemone paralyze the attacking predator for some time. Sometimes sea anemones hide under stones. The sea anemone is capable of making a “shot” with long goads (usually under pressure), and the detachment of the goads in the sea anemone occurs not from the inside, like in jellyfish, but from the outside, and then they break off, and the axis of the goad is shortened. The desire of organisms for monomyxy may have another explanation. The long length of the goads is necessary for their detachment during the molting process. Sea anemone reacts to light like most animals: it acquires a mesh