“It was on the third night that we found out that the octopus Otto was responsible for the chaos.

“We knew that he was bored as the aquarium is closed for winter, and at two feet, seven inches Otto had discovered he was big enough to swing onto the edge of his tank and shoot out the 2000 Watt spot light above him with a carefully directed jet of water.”

[…]

Once we saw him juggling the hermit crabs in his tank, another time he threw stones against the glass damaging it.– Telegraph