cnidarian


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cnidarian

(nī-dâr′ē-ən)
n.
Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity and stinging nematocysts, and including the jellyfishes, hydras, sea anemones, and corals.

cni·dar′i·an adj.
References in periodicals archive ?
The radial structures on the discoids are not consistent in number, size, shape, or arrangement as one might expect among a similarly sized population of cnidarian medusae.
1992) and the related hyolithelminth Torellella (Vinn 2006c) have been interpreted as cnidarians on the basis of their tube structure.
A total of 78 different species were found throughout this study, including polychaete worms (28 species), bivalves (11 species), amphipods (10 species), crabs (7 species), fishes (6 species), shrimps (2 species), cnidarians (1 species), and isopods (1 species).
Only 3 unidentified serpulids were present on Block #7 and only one unidentified gastropod and 2 unidentified cnidarians (all potentially nonvent-endemic species) were present on Block #9; the temperatures measured at the base of these blocks in both April 2004 and April 2005 ranged from 1.
Moreover, cnidarians appear unique among animals for their use of a primitive sense of smell to fine-tune their hearing organs to a few key frequencies.
The cnidarians observed infesting the gills of Caloosahatchee oysters did not seem to cause any pathologic distress to the hosts, even though large numbers of the symbiont were present in many of the collected animals.
In crustaceans, which are considered to have quite well-developed acid-base compensation mechanisms in contrast to other invertebrates such as echinoderms, cnidarians, or molluscs (Portner et al.
The analysis incorporated all available genomic information from all relevant animal lineages, including a newly sequenced group of sponges (Oscarella carmela) and the Cnidarians, a group of animals thought to have possessed the world's earliest eyes.
Percent of Total Known Marine Species by Taxonomic Group Taxonomic Group Percent CRUSTACEANS (lobsters, shrimp, krill) 19 MOLLUSKS (squid, clams, snails) 17 FISH (cod, catfish, tuna) 12 ALGAE (and other plantlike organisms) 10 PROTOZOA (unicellular microorganisms) 10 CNIDARIANS (jellyfish, corals, hydra) 5 ECHINODERMS (starfish, sea urchins, sea cucumbers) OTHER VERTEBRATES (seals, seabirds, turtles) 2 OTHER INVERTEBRATES (sponges, sea squirts, worms) 22 SOURCE: CENSUS OF MARINE LIFE
Such organisms probably looked similar to today's Cnidarians, such as corals or jellyfish.
Team Taxonomic Group Examples of Organisms 1 Plants Multicellular Algae, Liverworts, Mosses, Club Mosses, Horsetails, Ferns, Gymnosperms, Angiosperms 2 Fungi Protist-like Fungi, Common Molds, Sac Fungi, Club Fungi, Imperfect Fungi, Lichens 3 Protista Protozoa, Unicellular Algae, Slime Molds 4 Animals: Invertebrates Sponges, Cnidarians, Flatworms, Roundworms, Segmented Worms, Mollusks, Echinoderms, Arthropods 5 Animals: Vertebrates Fishes, Amphibians, Reptiles, Birds, Mammals Figure 2.
The diet of Northern Fulmars includes a wide range of fish, squid, copepods, amphipods and, to a lesser extent, polychaetes, pteropods, and cnidarians (Camphuysen and van Franeker 1996, Hatch and Nettleship 1998, Phillips et al.