a lot of fish fish要加复数吗?

a lot of fish fish要加复数吗? fish复数要加s吗 Look,those___(fish)hanve caught a lot of fish ___eat a lot of rice and fish There are a lot of fish. 1we___(watch)a lot of fish) there are a lot of fish People in Japan eat a lot of fish.We eat a lot of fish ,too. i bought a lot of fish 对a lot of fish提问 Fish可不可数? There is 还是are a lot of fish in the river? people / catch a lot of fish everyday / fewer and fewer fish there are a lot of fish in the ocean