Reef anemone

The sub-phyllum Anthozoa (6,500 species) contains the classes Alcyonaria (soft corals, sea fans, sea pens, sea pansies), Zoantharia (sea anemones and true corals), and Ceriantipatharia. The Scleroactinia (Madreporaria-true or stony corals) build the massive coral reefs and atolls which occur in tropical waters. According to Hashimoto (75), toxicity to humans is mainly found in the fire or stinging corals (Millepora sp.) and, to a lesser extent, in the stony corals (Goniopora sp.). 

Lipschultz, F., and Cook, C. B. (2002). Uptake and assimilation of N-ammonium by sea anemones, Aiptasia pallida and Batholomea anulata Interaction of host and zooxantheUae. Mar. Biol. 140, 489—502. Litder, M. M., Littler, D. S., Lapointe, B. E., and Barile, P. J. (2006). Toxic cyanobacteria (blue-green algae) associated with groundwater conduits in the Bahamas. Coral Reefs 25, 186. 

A few secondary coasts owe their characteristics to marine organisms rather than to the sea s physical processes. Both plants and animals can add their own customized touches to a coast. In the tropics, small anemone-like sea animals called corals build extensive reefs along the coasts. Coral animals surround themselves with a hard skeleton of calcium. When a coral animal dies, its skeleton becomes part of an ever-growing underwater skyscraper made of living organisms atop the skeletons of dead ones. The Florida Keys, a string of islands off the tip of Florida, have coral reef coasts. 

Other naturally occurring fluorescent proteins have been found in aquatic organisms including reef corals and sea anemones. The red fluorescent protein DsRed was discovered in the Anthozoan genus Discosoma. The DsRed fluorescent protein fluorophore features an imidazoline ring system similar to the GFP fluorophore but... 

The general public are generally aware of cnidarians because everybody has had the opportunity to see, either directly in the wild or indirectly in aquariums or in the media, jellyfish, sea anemones, gorgonians and coral reefs that contain huge amormts of the limestone skeletons of... 

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