Octos

Shemum is a recurring enemy from the Kid Icarus series. They are octopus-like creatures that eat clouds and are said to irritable and violent.

Kid Icarus
Octos appears only in Skyworld, where its attack pattern is similar to that of the enemy Commyloose. They are more powerful than Commyloose, though, with more hit points and attack power, but reward Pit with more Hearts and points/experience.

Kid Icarus: Of Myths and Monsters
In the Game Boy sequel, Kid Icarus: Of Myths and Monsters, there are monsters called Octus, and while the artwork does not resemble that of Octos from the first Kid Icarus, their in-game appearance and overall attack pattern is just like that of Octos.

Kid Icarus: Uprising
Octos is one of the many enemies confirmed to return in the long-awaited third installment, Kid Icarus: Uprising. They have been seen during the flying segments of the game, squirting rings of ink at Pit as he flies.