How can this possibly be real?

This article documents a very weird story told by a Japanese man. He claims to have buld a deep fryer on top of an acquarium full of fish. Since the oil and water don't mix, allegedly the fish are only harmed if they try to go above the water line. And spillover of food from the deep fryer can feed the fish.

I just can't help wondering how simple heat transfer doesn't eventually boil the water.