Fish! Honestly. They're always trying to be the centre of attention. Just look at 'Finding Nemo'... and... erm... well, we're sure there are other examples. Such as Gavin, here:
Yes, Gavin is a parrot fish who lives near Green Island, off Australia's Great Barrier Reef. And as these pictures prove, he loves nothing more than posing with tourists underwater:
"Gavin's been around for a couple of years now, and he looks forward to coming over and grinning his lovely little head off at all our guests," says Karl Kuhle, general manager of Seawalker Australia. "He does seem to actually swim up for his photo, and with a free feed on offer and gorgeous females for company, who wouldn't be smiling?"
Well, who indeed? Check out more snaps of the adorable Gavin below...