"Dia suka ikan besar."

Translation: He likes big fish.

[boringtomi]

"He likes a big fish" should be accepted

[kaibriMc]

And he cannot lie!

[Sam67858]

‘Large fish’ rejected. Large = big?

[Sjlver]

In English, big fish would seem a bit more idiomatic to me. I'd use "large" for a piece of furniture or a room, and "big" for things like fruit, fish... That's just my feeling, though.

There's also a great movie called "Big Fish" :)