Odontaster

Odontaster is a genus of starfish belonging to the family Odontasteridae. These starfish are found in the Southern Ocean and are characterized by their relatively stout bodies and prominent oral spines. Odontaster species are typically benthic, meaning they live on the seafloor, and are often found in deep-water environments. They are carnivorous, feeding on a variety of invertebrates, including mollusks and crustaceans.

The genus Odontaster was first described by Perrier in 1881. Several species have been identified within the genus, including Odontaster validus, which is one of the most common starfish in the Antarctic region. This species plays a significant role in the Antarctic ecosystem, acting as both a predator and a prey item for other marine animals. Odontaster species exhibit sexual reproduction, with external fertilization being common. The larval stages are planktonic before settling to the benthos to develop into adult starfish. Their distribution is primarily limited to colder waters, and they are well-adapted to the low temperatures and high pressures of their deep-sea habitats. Research on Odontaster species continues to provide insights into the biodiversity and ecological dynamics of Southern Ocean marine life.