Octopus (Super Mario Galaxy)
From the Super Mario Wiki
Octopuses are enemies appearing in the games Super Mario Galaxy and Super Mario Galaxy 2. They are quite different from real-world octopuses, as they do not swim. Rather, they are giant, gray Octoombas with many pale spots and a blue antenna. They are larger than their Octoomba relatives and their bodies look like they are twisted in coils, with four tentacle feet appearing from the bottom.
Super Mario Galaxy
In Super Mario Galaxy, these enemies mostly appear around airships and usually hide in barrels or stand on platforms until Mario approaches them, after which they will try to shoot Mario with coconuts/watermelons or fireballs as their main form of attack. They are always found in pairs. To defeat them, Mario has to send back the coconuts they shoot by spinning. One pair, which shoots only fireballs in the Space Junk Galaxy, must be destroyed by the player throwing shells towards them. Octoposes usually guard bridges that will be released upon their defeat.
Super Mario Galaxy 2
In Super Mario Galaxy 2, they reappear in the Shiverburn Galaxy where they act as the final enemy defense before facing Prince Pikante. Similarly to the first game, they guard a pathway (of rock over lava) that Mario must use to progress. However, unlike the previous game, there are found in sets of five instead of two. They also appear in the final galaxy, the Grandmaster Galaxy, on the Platform Planet; this is their only appearance where defeating them is not mandatory to progress forwards. They still shoot coconuts and fireballs in this game.
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