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''Triodon macropterus'' also known as the Threetooth puffer is a tetraodontiform fish, the only living species in the genus ''Triodon'' and family Triodontidae.〔Matsuura, K. (2014): Taxonomy and systematics of tetraodontiform fishes: a review focusing primarily on progress in the period from 1980 to 2014. ''Ichthyological Research, 62 (1): 72-113.'' 〕 Other members of the family are known from fossils stretching back to the Eocene. It is native to the Indo-Pacific, where found at depths to . Its name comes from the Greek ''tria'' meaning "three" and ''odous'' meaning "tooth", and refers to the three fused teeth making up a beak-like structure. The threetooth puffer reaches a maximum length of .〔 It has a distinctive shape, with a huge belly flap as large as or larger than its body; it inflates this with seawater when threatened. The flap bears an eye-spot, and is inflated by rotating the shaft-like pelvis downwards. This makes the animal appear much larger to predators, and less likely to be eaten.〔 The threetooth puffer is also known as the Black-spot keeled pufferfish, and was first scientifically described by Lesson in 1831. 〔Gomon, M.F. & Dianne J. Bray, D.J. (2011): Threetooth Puffer, ''Triodon macropterus'', (Fishes of Australia ).〕 File:Triodon macropterus JNC2989 Fresh.JPG|Freshly caught specimen, belly flap half extended File:Triodon macropterus JNC2989 Eye.JPG|Eye File:Triodon macropterus JNC2989 Spot.JPG|Eye-looking lateral black spot File:Triodon macropterus JNC2989 Teeth.JPG|Teeth File:MHNT - Triodon bourse.jpg|Museum specimen File:Triodon.jpg|Drawing by Cuvier ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Threetooth puffer」の詳細全文を読む スポンサード リンク
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