what fish?

Peter's jacuzzi had been broken for months so my mom decided to turn it into a fish pond.
One day Peter decided it was time to fix his jacuzzi and I saw him standing next to it vacuuming out all of the water.
"Peter, what'd you do with all the fish?"
"What fish?"
"Peter, mom put a bunch a little fish in there weeks ago!"
Peter stood there confused, stroking his mustache, and finally said "Well, I must have sucked them right up!"