Inky the octopus
A popular octopus named Inky managed a pretty impressive escape from the National Aquarium of New Zealand in April 2016. Inky slipped through a tiny gap at the top of his tank, reported the New York Times, and then slithered eight feet across the floor and slid down a 164-foot-long drainpipe, which dropped him into the bay. Keepers noticed Inky's getaway when they arrived and saw that the top of his tank was ajar. A less adventuresome-minded octopus, Blotchy, remained behind.
"Octopuses are fabulous escape artists, and it's absolutely not surprising that he saw an opportunity to explore and he took it,” Sy Montgomery, author of "The Soul of an Octopus," told PRI.org.
Montgomery said octopus escapes from aquariums are very common, because they can squeeze through the tiniest spaces and because they are incredibly curious.
"It doesn't mean that Inky was unhappy where he was,” Montgomery said. “Astronauts don’t go into outer space because they don't like Earth, they just want to see what else is out there."