Marine life individuals per square meter and accounting for about 80% of all individual animals on earth, their diversity of life cycles, and their presence at various trophic levels point at an important role in many ecosystems. Echinoderms (Greek for "spiny skin") is a phylum which contains only marine invertebrates. The adults are recognizable by their radial symmetry (usually five-point) and include starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7000 living species, making it the second-largest
Starfish site Starfish site Starfish sites were large-scale night-time decoys created during the Blitz to simulate burning British cities. The aim was to divert German night bombers from their intended targets so they would drop their ordnance over the countryside. The sites were an extension of Colonel John Turner's decoy programme for airfields and factories (code named "Q" Sites). Following the bombing, and near destruction, of Coventry in November 1940, Turner was tasked with creating decoys for seven major cities. Turner referred to the new sites as "Special Fire" or "SF". However, one early site (near Bristol) was given the name "Starfish",