Odontasteridae

Odontasteridae is a family of sea stars, or starfish, belonging to the order Valvatida. These starfishes are known for their distinctive appearance and are found in various marine environments around the world.

Red Sea Star – Odontaster validus

Common Names

Members of the Odontasteridae family are often referred to as "spiny sea stars" due to their prominent, sharp spines. Some species are also called "granulated sea stars" because of the granular texture of their bodies.

Characteristics

Odontasteridae sea stars possess a number of defining characteristics:

  • Five-rayed symmetry: Like most sea stars, they have a central body and five arms radiating outwards.
  • Spines: They are covered with numerous, prominent spines that are typically sharp and pointed. These spines serve as protection and aid in locomotion.
  • Granules: Many species have granular surfaces between their spines, giving them a rough and textured appearance.
  • Pedicellariae: These small, pincer-like structures are found on the surface of their bodies. They are used for defense and to keep the surface clean.
  • Tube feet: Located on the underside of the arms, these small, flexible structures are used for locomotion and feeding.

Environments

Odontasteridae sea stars inhabit a variety of marine environments, including:

  • Intertidal zones: Some species are found in the area where the ocean meets the land, often in rocky shores and tide pools.
  • Subtidal zones: Many species thrive in deeper water, from the shallow subtidal to the continental shelf.
  • Polar regions: Some species are adapted to cold, polar waters.

References

For further information on Odontasteridae, consult these reliable sources: