l have an old one like a panda and another one like a big fi

l have an old one like a panda and another one like a big fish.这句话哪里有错?

fish不可数.
like没错,因为这里做“像”用,conj.
再问： 这里的fish是指鱼而不是鱼肉，所以应该是可数的
再答： fish做鱼和鱼肉都是不可数的，只有做鱼种（类）时才可数，这个很容易搞错。 借用一下别人的例子：There are many fishes in the river. 意思是：小河里有许多种鱼。而不是说“小河里有许多鱼.”
再问： http://zhidao.baidu.com/question/268781430.html 我花了一个课间和我们英语老师讨论，作“鱼”时是可数的
再答： 谢谢你提醒，是我错了。 我刚去M-W查了： fish noun plural fish or fish·es 1 [count] : a cold-blooded animal that lives in water, breathes with gills, and usually has fins and scales ▪ a small fish ▪ an ocean/river fish [=a kind of fish that lives in an ocean/river] — see color picture 【usage： When you are talking about more than one fish, the plural fish is more commonly used than fishes. ▪ We caught several fish. When you are talking about more than one kind or species of fish, both fishes and fish are used. ▪ varieties of tropical fish ▪ all the fishes of the sea】 2 [noncount] : the meat of a fish eaten as food ▪ We're having fish for dinner. 也就是只有做鱼肉时不可数，做鱼和鱼种时可数。不过做鱼时，复数形式多写成fish；做鱼种，复数形式fish和fishes都可以。 那这样看句子没有错误。可能是在文中时态不一致吧。