Cnidaria families

Hydractiniidae is a cnidarian family of athecate hydroids.

Schizopathidae is a family of corals belonging to the order Antipatharia.

Chirodropidae is a family of venomous box jellyfish within the class Cubozoa. Like other members of the order Chirodropida, they have branched pedalia (muscular bases at the corners of their cubic umbrella), in contrast to the unbranched pedalia of box jellyfish in the order Carybdeida. Each branch houses its own individual tentacle. Nematocyst composition and type can vary among individuals within this family based on body size and life stage. Like other box jellyfish, chirodropids can be found in coastal and shallow marine areas, but they have also been found to occur at benthic depths. thu

Aphanipathidae is a family of corals in the order Antipatharia. Species in this family have short, blunt polyp tentacles that tend to be uniform. Spines range from conical to cylindrical and usually have conical tubercles. Unlike Antipathidae, species in this family are not notched or branched at the end.

Periphyllidae is a family of jellyfish containing four genera and six species. The most well-known member of the family, Periphylla periphylla, is usually considered a deep-sea species, but it forms large blooms in surface waters of Norwegian fjords.

Paralcyoniidae is a family of soft corals in the phylum Cnidaria.

Halcuriidae is a family of sea anemones belonging to the order Actiniaria.

Hormathiidae is a family of sea anemones in the class Anthozoa.

Corallimorphidae is a family of corallimorphs. It includes three genera:

Micrabaciidae is a family of marine stony corals of the order Scleractinia.

Chrysogorgiidae is a family of soft corals in the suborder Scleralcyonacea. So far, the only fossil record for the family are specimens tentatively identified as Radicipes sp. from Oligocene deep-water strata in western Washington State, USA.

Actinernidae is a family of sea anemones. It contains the following genera and species:

thumb | right Cladopathidae is a family of cnidarians belonging to the order Antipatharia.

Guyniidae is a family of corals belonging to the order Scleractinia (hard corals).

Virgulariidae is a family of sea pens, a member of the subclass Octocorallia in the phylum Cnidaria.

The Abylidae are a family of marine invertebrates in the order Siphonophorae. They are colonial, but the colonies can superficially resemble jellyfish; although they appear to be a single organism, each specimen is actually a colony of Siphonophora.

Aequoreidae is a family of hydrozoans, sometimes called the many-ribbed jellies or many-ribbed jellyfish. There are approximately 30 known species found in temperate and tropical marine coastal environments. Aequoreids include Aequorea victoria, the organism from which the green fluorescent protein gene was isolated. thumb|This map shows the distribution of the Aequoreidae family across the Pacific, Atlantic, and Indian ocean.

Chiropsalmidae is a family of venomous box jellyfish within the class Cubozoa.

Rhopalonematidae is a family of hydrozoans. The family comprises 15 genera and 36 species.

Acontiophoridae is a family of sea anemones.

Aliciidae is a family of sea anemones, comprising the following genera: Alicia Johnson, 1861 Cradactis McMurrich, 1893 Lebrunia Duchassaing de Fonbressin & Michelotti, 1860 Phyllodiscus Kwietniewski, 1897 Triactis Klunzinger, 1877

Lychnorhizidae is a family of true jellyfish.

Sagartiidae is a family of sea anemones.

Haloclavidae is a family of sea anemones. Members of the family are found worldwide and many live largely buried in soft substrates with only their oral disc and tentacles protruding.

Lucernariidae is a family of stalked jellyfish containing two genera.

Myriopathidae is a family of cnidarians belonging to the order Antipatharia.

Metridiidae is a family of sea anemones in the order Actiniaria.

Corymorphidae is a family of hydroid cnidarians. For long placed in a presumed superfamily or infraorder Tubulariida of suborder Capitata, they are actually close relatives of the Hydridae and are now united with these and a number of relatives in a newly recognized suborder Aplanulata. Most, if not all species in this family grow on stalks and resemble small flowers.

Carukiidae is a family of box jellyfish within the Cubozoa class. Carukiidae can be easily classified by their lack of cirri clumps inside the cubozoan stomach, as well as the size and the placement of their nematocysts.

Cladonematidae is a small family of anthomedusan hydrozoans. They have stolonal hydroid colonies, and their medusae are benthic and can crawl across the sediment; in many species they have lost the ability to swim however.

Pectiniidae was a family of stony corals, commonly known as chalice corals, but the name is no longer considered valid.

Pandeidae is a family of hydroids in the class Hydrozoa. Like other jellyfish there is usually a mature medusa form which is pelagic and reproduces sexually and a hydroid or polyp form which is often benthic and reproduces asexually by budding.

Stachyptilidae is a family of corals belonging to the order Pennatulacea.

Minyadidae is a family of sea anemones belonging to the order Actiniaria.

Boloceroididae is a family of sea anemones. It has a cosmopolitan distribution in tropical and temperate oceans.

Echinoptilidae is a family of sea pens, a member of the subclass Octocorallia in the phylum Cnidaria.

Halcampidae is a family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates.

Aglaopheniidae is a family of hydrozoans.

Botrucnidiferidae is a family of cnidarians belonging to the order Spirularia.

Isophelliidae is a family of sea anemones belonging to the order Actiniaria.

Linuchidae is a family of crown jellyfish.

Rhizophysidae is a family of siphonophores in the suborder Cystonectae. It includes Bathyphysa conifera, sometimes called the "flying spaghetti monster".

Cladocorynidae is a family of cnidarians belonging to the order Anthoathecata.

Prayidae is a family of marine invertebrates in the order Siphonophorae. They are colonial, and the colonies can superficially resemble jellyfish; although they appear to be a single organism, each specimen is actually a colony of Siphonophora.

Clausophyidae is a family of cnidarians belonging to the order Siphonophorae.

The Geryoniidae are a family of hydrozoans in the order Trachymedusae.

The Diphyidae are a family of siphonophores. These are colonial siphonophores with two nectophores (swimming bells) arranged one behind the other. The front one includes a somatocyst (extension of the gastrovascular system), while the hind one does not. The somatocyst often contains an oil droplet for buoyancy control. A nectosac (central cavity with muscular walls) in each nectophore allows the organism to swim efficiently.

Halicreatidae is a family of hydrozoans. The family comprises 6 genera and 9 species.

Condylanthidae is a family of sea anemones belonging to the order Actiniaria.

Halimedusidae is a family of cnidarians belonging to the order Anthoathecata.

Alatinidae is a family of box jellyfish within class Cubozoa, containing the following genera and species:

Candelabridae is a small family of cnidarians within the class Hydrozoa. Myriothelidae Hincks, 1868 and Symplectaneidae Fraser, 1941 are now accepted as synonyms of this family.

Kophobelemnidae is a family of corals belonging to the order Pennatulacea.

Australomedusidae is a family of cnidarians belonging to the order Anthoathecata.

thumb | right | alt=Protoptilum stet. (A). in situ image (B). whole colony (C). detail of polyps before preservation. | Protoptilum stet. (A). in situ image (B). whole colony (C). detail of polyps before preservation. Protoptilidae is a family of corals belonging to the order Pennatulacea.

Corynidae is a family of hydrozoans in the order Anthomedusae.

Rathkeidae is a family of cnidarians belonging to the order Anthoathecata.

Cornulariidae is a family of soft corals in the order Scleralcyonacea.

Gonactiniidae is a family of anthozoans in the order Actinaria.

Isanthidae is a small family of sea anemones in the class Anthozoa.