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
Northern spiny-tailed gecko Northern spiny-tailed gecko The northern spiny-tailed gecko ("Strophurus ciliaris") is a species of lizard in the family Diplodactylidae which is endemic to Australia. The meaning of the scientific name or binomial, "Strophurus ciliaris", comes from "strophurus" meaning "turning-tail" and "ciliaris" meaning "eyelashed", referring to the spines above the eyes. It is highly variable in colour. This species can vary from a uniform grey colour, with few black or orange scales, to rich brown, with a mottled pattern of grey, white, and orange scales. Spines are present along the tail and long spines are generally present above the eyes, giving the