英语词汇“anal fin”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	anal fin
释义	anal fin noun Zoology An unpaired fin located on the underside of a fish posterior to the anus.The second dorsal and the anal fin are well-separated from the caudal fin.... The fleshy, stalk-like pectoral and pelvic fins and similar fleshy second dorsal and anal fins are also unlike any other marine fishes. Dorsal and anal fins are typically completely formed by the time the fish has reached 7-13 mm.
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