Asteriidae
Asteriidae is a family of starfish, belonging to the order Valvatida, that are commonly known as sea stars. These are marine invertebrates with radial symmetry. This family includes some of the most familiar starfish, such as the common starfish (Asterias rubens).
Characteristics
Asteriidae are characterized by having five arms or more, radiating from a central disc. The arms are typically slender and tapered, and they are covered in small spines. They possess a madreporite, a small, sieve-like opening on the aboral surface, which is used for water intake. The mouth is located on the oral surface in the center of the disc, surrounded by a ring of tube feet that are used for locomotion and feeding.
Asteriidae species can vary in size and color, but they typically have a tough, leathery skin that is covered in ossicles (small, bony plates). They are carnivorous or omnivorous, feeding on a variety of organisms, including mollusks, crustaceans, and other invertebrates.
Environments
Asteriidae are found in a wide range of marine habitats, including rocky shores, sandy bottoms, and coral reefs. They are typically found in shallow water, but some species can live at depths of over 1,000 meters.
Common Names
Some common names for Asteriidae include:
- Sea stars
- Starfish
- Common starfish
References
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