Starfish Starfish Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or "basket stars". About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, below the surface. Starfish are marine invertebrates. They typically have a central disc and five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth,
Chloroflexi (phylum) One of Bergey's Manual of Systematic Bacteriology. Being a deep branching phylum (cf. Bacterial phyla) its classification was analysed in Volume One of Bergey's Manual of Systematic Bacteriology and included a single class with the same name, the class "Chloroflexi". Since 2001 however, new classes have been created thanks to newly discovered species, therefore currently the phylum "Chloroflexi" is divided into: Regarding the class "Dehalococcoidetes", the placeholder name was given by Hugenholtz & Stackebrandt, 2004, after "Dehalococcoides ethenogenes" a partially described species in 1997,<ref name="doi10.1126/science.276.5318.1568"></ref> whereas the first species fully described was "Dehalogenimonas lykanthroporepellens" by Moe et al. 2009, but