But happily they had now reached the tank of the octopods.

Here's an easy one: Lots of octopods have learned to twist off standard jar lids.

He was quite small, as octopods go, and young, yet he was large and powerful enough to have drowned an ox.

On the walls to either side, pale sharks prowled painted blue-green depths, whilst eels and octopods slithered amongst rocks and sunken ships.