Pacu vs. Sheephead
A few days ago, there was a story in the media about a strange-looking fish with 'human teeth'. It turns out this is a known species of fish known as the Pacu, which has a wide mouth and molars on it's lower lip. You can see it here. It's not even the strangest looking fish on the block: the Sheephead fish (above) has both upper and lower molars and boy, do..they...look...creepy!