YouTube link
Animal activists in China have
raised objections to a stage performer's "magic trick" which appears to involve goldfish swimming in synchronized formations. Some allege that magnets or iron particles have been cruelly implanted in the fish (others suggests that these are not real fish at all...)
The performance is highly reminiscent of one first posted at Neatorama in 2007; that video has been removed, but another copy is available
elsewhere on YouTube. And it's worth remembering that it is
possible to train goldfish.
Edit: Updated with better video, found at
BoingBoing.