Ali Delavar - Master of Marine Biology, Chabahar Maritime University

The Medusozoa are a subphylum of the phylum Cnidaria including about 3800 species in three classes: Hydrozoa, Cubozoa, and Scyphozoa (Daly et al., 2007). Cnidarians emanated early in the history of metazoan evolution as exhibited by fossil evidence (Ausich and Babcock, 1998; Cartwright et al., 2007; Chen et al., 2002; Hagadorn and Waggoner, 2000; Han et al., 2010) and molecular phylogenies (Dunn et al., 2008; Peterson et al., 2004, 2008). Medusozoans enclose a variety of forms, containing benthic and pelagic life- history phases with numerous species having both period within their life-cycle. they are recognized from their sister group, the Class Anthozoa (Bridge et al., 1995; Collins, 1998, 2003), by a medusoid body form in the life-cycle of some species and a linear mitochondrial genome (Bridge et al., 1992). Medusozoan distributed in temperate, subtropical and tropical waters (Chun-Lei et al., 2009). There has been restore to good condition benefit in these species because of emotional population vacillation, bloom making, and biological encroachment (reviewed in Mills, 2001; Purcell, 2005, 2007; Graham and Bayha, 2007), and also increased involve over envenomations affecting human health (Burnett, 2001). Ecologically, medusozoans are voracious predators of zooplankton and can have surprising effects on ecosystem.

Medusozoa, Lysis buffer, DNA extraction, ETOH, Centrifuge