Fish lives in the water.

[dido4]

1. Fish lives in the water.
2. Fish live in the water.

Q: Which sentence is right?
Someone told me the second one is right, but I doubt it. Isn't fish
plural?

 

[Rover_KE]

The second one is right. In this sentence 'fish' is plural, and they live in water.

Compare 'Dogs chase cats'.

Rover

 

[bhaisahab]

1. Fish lives in the water.
2. Fish live in the water.

Q: Which sentence is right?
Someone told me the second one is right, but I doubt it. Isn't fish
plural?

#2 is correct. "Fish live in water", "Cattle live on land". "Dogs eat meat". Etcetera.