Australian giant crab (English name: Pseudocarcinus gigas; Australian giant crab; Tasmanian giant crab)

Japanese: オーストラリアオオガニ（英語表記）Pseudocarcinus gigas; Australian giant crab; Tasmanian giant crab

It is a member of the order Decapoda and family Polytrichum communes. Its carapace is approximately 60cm wide and weighs over 10kg. It has a light brown base with irregular dark reddish brown patterns. Its carapace is elongated and oval, with a shiny surface that curves forward and backward. The stomach, heart, liver, and gill regions are separated by shallow grooves. The anterior edge of the carapace consists of four lobes, each with two to three teeth. The chelicerae are not the same, with one side being enlarged. Its carapace is larger than that of the Japanese spider crab, but its walking legs are clearly shorter. It is found only in the waters off the coast of Tasmania in southeastern Australia, from the island to the southern part, and is edible. It is generally found at depths of 100 to 180m. (→Crustacea, Decapods, Arthropods, Malacostraca)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

軟甲綱十脚目イソオウギガニ科。甲幅約 60cm，重さ 10kgをこえる。淡褐色地に濃い赤褐色の不規則模様がある。甲は横長の楕円形で，甲面は光沢があり，前後に湾曲する。胃域，心域，肝域，鰓域は浅い溝で隔てられている。甲の前側縁は 4葉からなり，それぞれ 2～3歯をもつ。鋏脚は左右不同で，どちらか一方が巨大化している。日本産のタカアシガニよりも甲は大きいが，歩脚は明らかに短い。オーストラリア南東部のタスマニア島近海から南部にかけてのみ分布し，食用とされている。一般に水深 100～180mから得られる。（→甲殻類，十脚類，節足動物，軟甲類）

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