The Valvatida are an order of starfish in the class Asteroidea, which contains 695 species in 172 genera in 17 families.
The Astropectinidae are a family of sea stars in the order Paxillosida. Usually, these starfish live on the seabed and immerse themselves in soft sediment such as sand and mud.
The Asteriidae are a diverse family of Asteroidea in the order Forcipulatida. It is one of three families in the order Forcipulatida.
Coscinasterias is a genus of sea stars of the family Asteriidae.
Nardoa is a genus of sea stars in the family Ophidiasteridae.
Goniasteridae constitute the largest family of sea stars, included in the order Valvatida. They are mostly deep-dwelling species, but the family also include several colorful shallow tropical species.
The Brisingids are deep-sea-dwelling starfish in the order Brisingida.
The Oreasteridae are a family of sea stars in the class Asteroidea.
Solaster is a genus of sea stars in the family Solasteridae.
Hippasteria is one of 70 genera of sea stars in the diverse family Goniasteridae.
The Freyellidae are a family of deep-sea-dwelling starfish. It is one of two families in the order Brisingida. The majority of species in this family are found in Antarctic waters and near Australia. Other species have been found near New Zealand and the United States.
Paranepanthia is a genus of starfish of the family Asterinidae. Members of the genus have five rays and are found in the waters around Australia, Indonesia and Antarctic New Zealand.
Coronaster is a genus of starfish in the family Asteriidae.
Myxasteridae is a family of deep-sea velatid sea stars containing nine species in three genera.
Astroceramus is a genus of abyssal sea stars in the family Goniasteridae.
Mediaster is a genus of starfish in the family Goniasteridae. It was circumscribed in 1857 by William Stimpson for M. aequalis, the genus's type species. Its junior synonym is the genus Isaster, which was circumscribed in 1894 by Addison Emery Verrill for the species now known as M. bairdi. Verrill himself synonymized the two genus names in 1899.
Asterodiscididae is a family of starfish. Members of the family have five short tapering arms and a wide disc. The family was first described by the Australian zoologist F.W.E. Rowe in 1977.
Freyella is a genus of deep-sea-dwelling starfish in the order Brisingida.
Ophidiaster is a genus of echinoderms belonging to the family Ophidiasteridae.
Cladaster is a genus of echinoderms belonging to the family Goniasteridae.
