【正文快照】： 耳石(Otolith)是 硬骨鱼类 ( Teleosts )在生长过程中沉积在内耳中的结石,主要矿物成分是CaCO3,起声音接收和平衡定向作用。
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侏罗纪厚茎鱼科（Pachycormidae）的疑问利兹鱼（Leedsichthys problematicus）是一种体型尺寸巨大的硬骨鱼类（bony fish），所以非常著名。
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软骨鱼类 Chondrichthyes ; cartilaginous fish ; chondrichthian ; Chondrichthyans
硬骨鱼类 Osteichthyes ; teleosts ; bony fishes
真骨鱼类 teleosts ; Teleostei ; ryby kostnoszkieletowe ; bony fishes
全骨鱼类 Holosteans
淡水硬骨鱼类 fresh water bony fish
真真骨鱼类 Euteleostei
新真骨鱼类 neoteleosts
粒骨鱼类 [古生] Coccosteomorphi
软骨鱼类或纲鱼 elasmobranchiate
用气泡或腮呼吸生活于南半球的多骨鱼类；有时被归为总鳍鱼类。
Bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of crossopterygii.
刺鳐是鲨鱼的近亲，种类有200多种，善于无骨鱼类，其骨架是由软骨构成的。
Like their close relatives the sharks, the 200-odd species of stingrays are boneless fish that boast skeletons made of tough tissue called cartilage.
所以，擅长研究鱼耳石(记录鱼类迁徙类型历史的耳骨)的福岛先生说他必须抓紧时间完成自己的研究。
And so Mr Fukushima, whose expertise is in examining otoliths-the ear bones that provide a history of a fish's migratory patterns-says he feels he must hurry to finish his research.
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