Starfish is a kind of organism which is widely distributed in the bottom of the ocean. It has attracted much attention from biologists because of its unique morphological and physiological characteristics. Starfish usually have a radiating body type, usually consisting of five or more limbs that extend outward from a central disc-like body. Each limb is equipped with powerful suckers that help the starfish move around the seafloor and catch prey.

In terms of physiological structure, the internal structure of starfish is relatively simple. They lack a spine and heart, but have a water-vascular system, which is responsible for movement and predation. Through the vascular system, starfish are able to use water pressure to expand and contract their suckers, allowing them to move flexibly. Starfish are not only excellent reptiles, they are also excellent hunters. They feed on bivalve mollusks such as mussels and oysters, and are able to stretch out their stomachs to wrap around their prey and secrete digestive juices to break down the food.

The sea star's ability to regenerate is another wonder in its life history. When their limbs are damaged or broken, they can regrow new limbs within a certain period of time. This trait not only helps the starfish survive in the face of predators, but also allows them to occupy a certain ecological niche in the population. The regeneration research of starfish has also aroused great interest among scientists, and may bring new Revelations to the medical field in the future.

Starfish play an important role in the ecosystem. They are a key part of the Marine food chain, both as predators and prey for certain organisms. In addition, starfish have an important impact on the maintenance of Marine ecological balance. Their predatory behavior can control the population of certain mollusks and prevent ecological imbalances.