魚類屬於脊椎動物,一般生物學家將脊椎動物分為魚類(53%)、鳥類(18%)、爬蟲類(12%)、哺乳類(9%)、兩棲類(8%)五大類。根據Nelson(1994年)統計,全球而家存在嘅魚類共有24618種,佔已命名脊椎動物一半以上。
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水族館度一條魚 | ||||
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