WAcanthaster brevispinus, the short-spined crown-of-thorns starfish, is one of the two members of the starfish genus Acanthaster, along with the much better-known A. planci, the common crown-of-thorns starfish.
WAplidium californicum is a species of colonial sea squirt, a tunicate in the family Polyclinidae. It is commonly known as sea pork.
WBispira brunnea, the social feather duster or cluster duster, is a species of marine bristleworm. They tend to live in groups of individuals, and are common off the Caribbean islands in southeast North America. The feather duster has one crown of various colors, however, the color of the crown seems to be consistent within individual colonies.
WDoratogonus is a genus of millipedes in family Spirostreptidae. They are relatively large, at 80–200 millimetres (3–8 in) long, relatively common, and distributed across Southern Africa. Many of the species are listed on the IUCN Red List due to habitat destruction.
WLuidia superba is a tropical species of starfish in the family Luidiidae. A single specimen was found off the Pacific coast of Colombia in 1888; the species has since been found in the Galapagos Islands. It is endemic to this area and has not been recorded elsewhere.
WNotocrinus virilis is a marine invertebrate, a species of crinoid or feather star in the family Notocrinidae. It is found in deep water in the Southern Ocean around the coasts of Antarctica and adjacent islands. A sea snail sometimes parasitizes it.
WPolyclinum planum, is a compound ascidian commonly known as the Elephant Ear Tunicate. It is an ascidian tunicate in the family Polyclinidae. Ascidians are also known as sea squirts.
WProcyliosoma tuberculatum is a giant pill millipede of the family Procyliosomatidae, endemic to New Zealand. Two subspecies are recognised – P. t. tuberculatum and P. t. westlandicum.