As of May 2014, starfish are considered to be threatened. Also known as sea stars, these marine animals are easily preyed upon because they are unable to move quickly. Their underwater predators include fish, rays, crabs and sharks.Know More
The shoreline is equally problematic for starfish, where their predators are marine birds as well as humans who may seek to take home an oceanic souvenir. Pollution in recent years has also played a role in the decline in the number of starfish.
Starfish live in oceans worldwide and are generally comprised of a center disk with five arms. They move about with the use of a hydraulic water vascular system rather than a jointed skeleton.Learn more in Starfish
Starfish do not have bones, but instead have a series of hard plates that provide structure and support to their bodies. Starfish and other critters like them are called echinoderms, or marine invertebrates, which are tailed, finned animals that have backbones — they are not actually fish at all.Full Answer >
A starfish eats by wrapping its arms around a bivalve's shell, prying it open, injecting its stomach into the shell and then digesting the prey. After digesting, it slides the stomach back into its body. This allows the starfish to eat food that cannot fit through its tiny mouth.Full Answer >
Starfish, or sea stars, range in size from 5 inches to over 9 inches. Starfish may weigh over 10 pounds. There are 2,000 species of starfish, with most having five arms, but some species having as many as 40 arms.Full Answer >
Starfish can reproduce either sexually or asexually. Both male and female starfish exist, though they are externally indistinguishable from each other. They breed by releasing eggs and sperm into the water. The sperm fertilizes the eggs, and the resultant larvae eventually settle on the ocean floor to grow.Full Answer >