Botrylloides is a genus of ascidian tunicates in the family Styelidae.
Styela is a genus of tunicates. Styela clava, an edible species, is known as an invasive species in some areas.
Paludinella is a genus of minute salt marsh snails with an operculum, aquatic gastropod mollusks or micromollusks, in the family Assimineidae.
Acmaea is a genus of sea snails, specifically true limpets, marine gastropod mollusks in the family Acmaeidae, one of the families of true limpets.
Ringiculidae are a family of minute deep water sea snails, marine gastropod mollusks or micromollusks in the informal group Lower Heterobranchia.
Halocynthia is a genus of ascidian tunicates in the family Pyuridae. Species such as H. roretzi are eaten in parts of Asia as a delicacy.
Admete is a genus of medium-sized sea snails, marine gastropod molluscs in the subfamily Admetinae of the family Cancellariidae, the nutmeg snails.
Stolidobranchia is an order of tunicates in the class Ascidiacea. The group includes both colonial and solitary animals. They are distinguished from other tunicates by the presence of folded pharyngeal baskets. This provides the etymology of their name: in ancient Greek, στολίς, ίδος means the "fold" of a cloth. Stolidobranchian sea squirts are also characterized by the complete absence of an abdomen. The abdominal organs of other tunicates are instead located to one side of the pharyngeal basket in this group.
Velutina is a genus of small sea snails, marine gastropod mollusks in the family Velutinidae.
Facelina is a genus of sea slug, an aeolid nudibranch in the family Facelinidae.
Lucernariidae is a family of stalked jellyfish containing two genera.
Aplidium is a genus of colonial sea squirts, tunicates in the family Polyclinidae. There are about 188 species in the genus found in shallow waters around the world.
Molgulidae is a family of tunicates in the class Ascidiacea. Following a revision in 2007, the family Hexacrobylidae was synonymized with Molgulidae.
Anatemnus is a genus of pseudoscorpions in the Atemnidae family.
Synoicum is a genus of colonial sea squirts, tunicates in the family Polyclinidae.
Pareugyrioides is a genus of marine tunicates.
Dendrodoa is a genus of ascidian tunicates in the family Styelidae.
Cnemidocarpa is a genus of ascidian tunicates in the family Styelidae.
Culeolus is a genus of ascidian tunicates in the family Pyuridae.
Lucernaria is a genus of cnidarians belonging to the family Lucernariidae.
