Cnidaria {phylum}

Cnidaria (play /naɪˈdɛəriə/ with a silent c) is a phylum containing over 10,000species of animals found exclusively in aquatic and mostlymarine environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids, or both. Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors. Several free-swimming Cubozoa and Scyphozoa possess balance-sensingstatocysts, and some have simple eyes. Not all cnidarians reproduce sexually. Many have complex lifecycles with asexual polyp stages and sexual medusae, but some omit either the polyp or the medusa stage. full article at Wikipedia

Specimen Records:	51,738	Public Records:	40,148
Specimens with Sequences:	46,406	Public Species:	3,779
Specimens with Barcodes:	26,695	Public BINs:	1,722
Species:	4,305
Species With Barcodes:	3,598
Species List - Progress		Access Published & Released Data

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Collected from 49 countries. Top 20: Show All Countries

Canada 3632 Mexico 331 Brazil 89 United States 3271 Norway 321 Portugal 85 Australia 1999 South Africa 194 Malaysia 70 Israel 1140 United Kingdom 128 India 36 Costa Rica 397 Argentina 122 Switzerland 28 Netherlands 384 Peru 104 Germany 26 Panama 379 Japan 101