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Porcupinefishes or balloonfishes, are any of the various species of the genus ''Diodon'', the type genus of Diodontidae. ==Distinguishing features== Fish of the genus ''Diodon'' have: * two-rooted, movable spines (which are derived from modified scales) distributed over their bodies. * beak-like jaws, used to crush their hard-shelled prey (crustaceans and molluscs).〔 They differ from the swelltoads and burrfishes (genera ''Cyclichthys'' and ''Chilomycterus'', respectively), which, in contrast, have fixed, rigid spines. 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「Diodon」の詳細全文を読む スポンサード リンク
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