Yes, because cats are naturally carnivores in the wild. In the case of a house cat, however, you should only be feeding it cat food.
ADD:
Just to expand on the first answer, yes, cats can eat fish, but this should never be the sole food source for a cat as a fish does not meet the cat's nutritional requirements. In the wild, a cat's main food source is mice, birds and other small animals. Most cats will only hunt fish if there is no other food source available.
Fish should be fed to pet cats as an occasional treat, or as part of nutritionally complete cat food.
All domestic cats like fish.
Cats love to chase and eat fish
Yes, they do eat fish.
fish
Kittens & cats both eat Fish, it doesn't have to be any certain type of fish as long as it is a raw fish.
cats, small dogs, birds, mice, squirrels, and rabbits. they might get a fish too
Cats aren't meant to eat 'animals' if they live indoors.
cats-birds-bears-man-bigger fish eat smaller fish
Alligators eat anything they can catch: turtles, birds, fish, frogs, snakes, raccoons, deer, dogs, cats, etc. Small alligators eat smaller prey, such as dragonflies, frogs, small fish, small snakes, etc.
Pedigree Fish?
No, it is not safe for cats to eat betta fish. Betta fish contain toxins from their skin that can be harmful to cats if ingested. It is best to keep the two animals separated to ensure their safety.
they like to eat, Noodles (ramen), sushi, fish, and different kinds of meat like cats,dogs and small children