Isaac & His Fishes

Isaac had a fishbowl.
In it was a fish,
Swimming around with a swish, swish, swish!
Isaac said, "I know what I will do.
I'll buy another and that will make two."
Isaac said, "I'm sure it would be
Very, very nice if I just had three."
Isaac said, "If I had one more,
That would make one, two, three, four."
Isaac said, "What fun to see them dive, one, two, three, four, five."
How many fishes do you see? How many fishes? Count them with me!