A magician called Cyril Takayama performs a few tricks at an Aquarium in Japan. First he makes the card appears to go through the glass then he reaches through the glass on the other side to fetch the card. Stunningly smooth magic, my theory is the fish are in on the trick.
I noticed that YouTube is also circling the drain by removing this and some other videos from the magician. Kudos to veoh for embeddable video and being too small to threaten.