Octopy can initially be seen wandering around slowly, pacing left and right.
If they spot a player in front of them, they will shoot a blinding black ink that obscures the player's screen and forces the player off of any mount they are riding. Regardless of whether or not the ink hit the player, they will run in the direction that they initially saw the player from like a caveman would, even running off of ledges.
The blinding black ink will not affect the player if they are still wet from entering Water.
If the player gets above an Octopy, it will jump up in an attempt to ram the player with its crown of sharp barnacles, dealing 1 damage and stunning them.
If the player has Spring Shoes, the crown of barnacles will not harm the player, who will simply bounce off of the Octopy. However, with Spike Shoes, the Octopy will take the 3 damage that the shoes deal, being instantly killed.