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This seastar is an invasive species in Australia. [19] It has colonised Australian waters in the Derwent Estuary, Port Phillip Bay and Henderson Lagoon in Tasmania. [2] [12] In the Derwent Estuary, the Northern Pacific seastar has been connected to the decline of the endemic endangered spotted handfish. [20] [21] [22]
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.
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 ]
Since the region of Oceania consists of islands, seafood is a prominent part of the diet, with vegetables such as potatoes, sweet potato, taro and yams being the main starch. Coconut , and its derivative products such as coconut milk , coconut oil and coconut sugar , is an important ingredient in the tropics of Oceania.
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