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
HMS Starfish (1916) "Starfish" had transferred to the Gunnery School at the Nore, and in March was supporting the torpedo school at the Nore, while by November she had transferred to the Nore Local Defence Flotilla. On 21 April 1928, "Starfish" was sold for scrap to Alloa of Charlestown. HMS Starfish (1916) HMS "Starfish" was an destroyer which served with the Royal Navy. She was launched on 27 September 1916 and sold to be broken up on 21 April 1928. She was built by Hawthorn Leslie of Hebburn Tyne. "Starfish" was one of ten destroyers ordered by the British Admiralty in December 1915