fish的是單數還是復數

　　例句

　　The fish lay thousands of eggs at one time.

　　這種魚一次產卵數千個。

　　These fish are found in shallow waters around the coast.

　　這些魚生長在海邊淺水水域。

　　I've never been a great one for fish and chips.

　　我從來不是個好吃炸魚薯條的人。

　　There are about 30 000 species of fish in the world.

　　世界上約有3萬種魚。