Holothuria is the type genus of the marine animal family Holothuriidae, part of the class Holothuroidea, commonly known as sea cucumbers. Members of the genus are found in coastal waters in tropical and temperate regions. They are soft bodied, limbless invertebrates that dwell on the ocean floor and are usually detritivore. They resemble a cucumber in form. The genus contains some species that are harvested and sold as food.
The Serpulidae are a family of sessile, tube-building annelid worms in the class Polychaeta. The members of this family differ from other sabellid tube worms in that they have a specialized operculum that blocks the entrance of their tubes when they withdraw into the tubes. In addition, serpulids secrete tubes of calcium carbonate. Serpulids are the most important biomineralizers among annelids. About 300 species in the family Serpulidae are known, all but one of which live in saline waters. The earliest serpulids are known from the Permian.
Spirobranchus is a small genus of tube-building annelid fanworms in the family Serpulidae.
Ancorina is a genus of sea sponges belonging to the family Ancorinidae. It is the type genus of its family.
Hipponix, common name hoof snails or hoof shells, is a genus of small sea snails with limpet-like shells, marine gastropod molluscs in the family Hipponicidae, the hoof snails. Many of the species in this genus have white shells.
Harmothoe is a genus of marine Polychaete worms belonging to the family Polynoidae. Species of Harmothoe are found world-wide to depths of at least 5,000 m but are more common in shallower water.
The Caryophylliidae are a family of stony corals found from the tropics to temperate seas, and from shallow to very deep water.
Acrocirridae is a family of polychaete worms. Acrocirrids are detritivores, catching falling particles with numerous long prostomial tentacles. There are eight known genera, and at least 21 described species and subspecies within the Acrocirridae. The acrocirrids are primarily benthic (seabed-dwelling) animals, but at least two genera appear to have evolved or adapted to a pelagic (free-swimming) habitat.
Odontaster is a genus of sea stars. The type species is Odontaster hispidus.
Gersemia is a genus of soft corals in the family Nephtheidae. Species in this genus are found in cold temperate and polar seas at depths ranging from 20 metres (66 ft) to over 2,000 metres (6,600 ft). The type species is Gersemia loricata.
Lobophytum is a genus of soft corals commonly known as devil's hand corals or devil's hand leather corals.
Flabellum is a genus of marine corals belonging to the family Flabellidae. These are a diverse group of azooxanthellate corals with about 190 species, 47 of which are extant. They are exclusively solitary corals and many are deep water species.
Sarcophyton is a genus of corals in the family Alcyoniidae that are commonly kept in reef aquaria.
Pseudocnus is a genus of sea cucumbers in the family Cucumariidae.
Gersemia juliepackardae is a species of soft coral in the family Nephtheidae. It is found in the northeast Pacific Ocean, on seamounts or on the deep ocean bed. The coral is named in honour of Julie Packard, the executive director of the Monterey Bay Aquarium, for "her dedication to ocean stewardship and conservation, and for elevating public awareness about the ocean environment."
Nonparahalosydna is a genus of polychaetes belonging to the family Polynoidae.
Labyrinthocyathus is a genus of cnidarians belonging to the family Caryophylliidae.
Madracis is a genus of cnidarians belonging to the family Pocilloporidae. The genus has a cosmopolitan distribution.
Pseudostichopus is a genus of sea cucumbers belonging to the monotypic family Pseudostichopodidae. The genus has a cosmopolitan distribution.
