Heliasteridae
The Heliasteridae are a family of starfish, commonly known as sun stars, that are found in the Pacific Ocean. These are among the largest starfish, reaching up to a meter in diameter.
Common Names
Heliasteridae are commonly known as sun stars or sea stars.
Characteristics
Heliasteridae are characterized by their numerous arms, typically 10 or more, that radiate from a central disc. The arms are long and slender, and they are often covered in spines. The mouth is located on the underside of the central disc, and it is surrounded by a ring of small, fleshy tentacles. Heliasteridae are carnivores, and they feed on a variety of invertebrates, including mollusks, crustaceans, and other starfish.
Environments
Heliasteridae are found in a variety of marine environments, from shallow coastal waters to the deep sea. They are often found in rocky areas, coral reefs, and seagrass beds. Some species of Heliasteridae are found in the intertidal zone, while others are found in the deep sea, at depths of over 2,000 meters.