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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ginglymostomatidae ： ウィキペディア英語版 Ginglymostomatidae The Ginglymostomatidae are a cosmopolitan family of carpet sharks, containing two monotypic genera of nurse sharks.〔("Ginglymostomatidae - nurse sharks" ) New Hampshire Public Television. Retrieved 2014-2-2.〕 Common in shallow, tropical and subtropical waters, these sharks are sluggish and docile bottom-dwellers.〔("Ginglymostomatidae Gill, 1862" ) World Register of Marine Species. Retrieved 2014-2-2.〕 Nurse sharks typically attack humans only if directly threatened. The name nurse shark is thought to be a corruption of ''nusse'', a name which once referred to the catsharks of the family Scyliorhinidae. The nurse shark family name, Ginglymostomatidae, derives from the Greek words ''ginglymos'' (γίγγλυμος) meaning "hinge" and ''stoma'' (στόμα) meaning "mouth". ==Description== The largest species, called simply the nurse shark ''Ginglymostoma cirratum'', may reach a length of ; the tawny nurse shark ''Nebrius ferrugineus'' is somewhat smaller at , and the short-tail nurse shark ''Pseudoginglymostoma brevicaudatum'' is by far the smallest at just in length. The first of the three species may reach a weight of 110 kg. Yellowish to dark brown in colour, nurse sharks have muscular pectoral fins, two spineless dorsal fins (the second of which is smaller) in line with the pelvic and anal fins, and a tail exceeding one quarter the shark's body length. The mouth of nurse sharks is most distinctive; it is far ahead of the eyes and before the snout (subterminal), an indication of the bottom-dwelling (benthic) nature of these sharks. Also present on the lower jaw are two fleshy barbels, chemosensory organs which help the nurse sharks find prey hidden in the sediments. Behind each eye is a very small, circular opening called a spiracle, part of the shark's respiratory system. The serrated teeth are fan-shaped and independent; like other sharks, the teeth are continually replaced throughout the animal's life. 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「Ginglymostomatidae」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.