Starfish

Starfish, also called sea stars, are marine animals that live in oceans around the world. They belong to a group of animals called echinoderms, which also includes sea urchins and sea cucumbers. Most sea stars have five arms, although some species can have many more.

Their body is covered with a tough outer surface made of small hard plates, and their underside contains hundreds of tiny tube feet that help them move, attach to surfaces, and capture food. Sea stars do not have a brain or blood like vertebrates, but they have a simple nervous system that helps them sense their surroundings.

They feed on various organisms, including shellfish, small animals, and organic matter. Sea stars are important members of marine ecosystems because they help control populations of other animals and contribute to the balance of life on the seabed.

Some species are known for their ability to regenerate lost arms, and in certain cases, a new individual can develop from part of a damaged body if enough essential structures remain. They usually move slowly across rocks, sand, and coral areas, searching for food or shelter. Their role as predators and scavengers makes them valuable for maintaining healthy ocean environments. Although they may appear simple, sea stars have developed unique adaptations that allow them to survive in many different marine habitats.