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Asterias amurensis, also known as the Northern Pacific seastar and Japanese common starfish, is a seastar found in shallow seas and estuaries, native to the coasts of northern China, Korea, far eastern Russia, Japan, Alaska, the Aleutian Islands and British Columbia in Canada.
The Northern Pacific seastar is considered a serious pest of native marine organisms in Australia, and is a major factor in the decline of the critically endangered spotted handfish. It preys on the handfish eggs, and/or on the sea squirts (ascidians) [ 1 ] that help to form the substrate that the fish spawn on. [ 2 ]
northern Pacific seastar: northern Pacific in northern China, South Korea, North Korea, Japan, Far East Russia, Alaska and Canada (British Columbia) Asterias argonauta Djakonov, 1950: Primorsky Krai (Peter the Great Gulf), South Korea Asterias forbesi (Desor, 1848) northwest Atlantic, from Labrador south to the Caribbean Sea and Gulf of Mexico
In a study comparing seastar righting behavior the Henricia leviuscula twisted arms 1 and 3 toward each other, used arms 4 and 5 to support itself on the bottom of the tank, and moved arm 2 up so it was in a sitting-like position, and began to flip itself over. Overall, it had an average righting time of 15.22 minutes.
Printable version; In other projects Appearance. ... Pages in category "Biota of the Temperate Northern Pacific" The following 21 pages are in this category, out of ...
The diet includes sea cucumbers, snails, limpets, mussels, chitons and barnacles as well as carrion. Over much of its range it competes with the larger Pisaster ochraceus (ochre starfish) for food. [4] Leptasterias hexactis is dioecious with individuals being either male or female. In Puget Sound, reproduction takes place between November and ...
There are also marine and intertidal pest species present at the coastal park. The sabellid fan worm (Sabella spallanzanii) and the northern Pacific sea star (Asterias amurensis) both reside along the western shoreline of Port Phillip Bay and are very successful at spreading and out-competing native species. [2]
The orange sun star is found in the northern Pacific Ocean, its range extending from Japan and the Bering Sea and along the North American coast as far south as California. With a depth range of between 11 and 3,740 metres (36 and 12,270 ft), it occurs at greater depths than any other starfish in the north west Pacific.