human
What on earth do you suppose those gigantic fish feed on?
gpt
Bats! I muttered.
human
They feed on bats as other fish feed on the little, gauzy-winged flies which dance over ponds! You saw those bats flying over the pond last night, didn't you? That explains the whole thing! Don't you understand? Why, what we saw were these gigantic fish leaping like trout after the bats. It was their feeding time!