Topics on SHARK-L include shark biology, behavior and evolution, stories about diving with sharks, sharks in the media, shark folklore, sharks' relationship with human beings, shark conservation efforts, and resources for shark aficionados. SHARK-L is an informal, conversational list for both lay people and scientists. If you want to talk about ...

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Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the division Selachii[1] (or Selachimorpha) [2] and are the sister group to the Batoidea (rays and skates).

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姥鲨 （學名： Cetorhinus maximus），又名 象鯊 、 象鮫，是姥鲨科及姥鲨屬中唯一的一個 物种，為世界上第二大的現生 魚類，僅次於 鯨鯊。 姥鲨分布在全世界的 温带 海洋。 牠們的 口部 巨大但游动缓慢，是以吃 浮游生物 为生的 濾食性動物，對人類沒有危險性。 就像其他的大型 鯊魚，姥鲨正面臨 滅絕 的危險，原因是其极低的繁殖率及人类的過份捕杀，以供應世界各地對 魚翅 、魚肉及 器官 的需求。 姥鲨是 姥鲨科 中的唯一成員。 牠的學名是由Johann Ernst Gunnerus …

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2 天之前 · Shark, any of numerous species of cartilaginous fishes that make up the order Selachii (class Chondrichthyes). Most species have a tough skin that is dull gray in color and roughened by toothlike scales.

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