If you're talking about the creatures themselves, 'fish' is countable. How many fish did you catch? One fish Two fish Three fish The only unusual thing about the noun 'fish' is that the plural form in modern English is the same as the singular. The noun 'sheep' is the same : one sheep, two sheep. By the way, Zachary is mistaken when he says that 'fishes' is incorrect. It's simply an older form which is rarely used nowadays. The Bible story known as The Feeding of the Five Thousand is also referred to as the miracle of the loaves and the fishes. Scientists also use the word 'fishes' to refer to different species of fish. In the context of food, 'fish' is usually uncountable, in the same way as 'meat' or 'cheese' is uncountable. For example, you might say 'I don't eat much fish' or 'Can I have a little bit of fish?'

both When prepared and served as food, it is usually uncountable. "We'd eaten fish for dinner that night." "How MUCH fish did you eat?" "A LOT of it!" Often that is the case, as when it is food we treat it as a substance, unless you actually knew how many animals it was before eaten! I'd be surprised if you heard people counting how many they ate... "we ate 3 fish!"; I'd assume you ate them while they were still alive! Haha... Because: As an animal, they can be counted; however, it uses an unchanged plural (the plural and singular are in fact identical). 1 fish 2 fish However, it is not uncommon for English speakers to make a mistake and say "fishes", but it is not generally accepted and is incorrect.

Countable! One fish, two fish, red fish, blue fish....

That's a great question! "Fish" can be singular or plural. Both "fish" and "fishes" are correct terms for more than one fish, but "fish" is more commonly used. (Edited: Source removed)

Zachary's answer is mostly right. However, it is actually correct to use the plural form "fishes" if you're specifically referring to multiple species of fish. "There are many fish at the public aquarium" means the aquarium has a lot of fish (in general). "There are many fishes at the public aquarium" means the aquarium has a lot of different types of fishes. You can do a Google search for "plural fishes" to see more on the topic. In most normal situations, though, you'll always say "fish," even if you're counting them or talking about a lot of them. And as Zachary says, "fish" becomes uncountable as a food substance (the same is true for chicken and most other animal foods).