Octrolls are creatures native to SR388 resembling octopuses, whose sizes make them larger than Samus. These cephalopods' attack pattern is nearly identical to that of the Chute Leech, though the former can jump much higher and cause more damage. Two of their tentacles possess fins, possibly used to float through the air. When destroyed, they nearly always yield large energy units. They are encountered in only one section of SR388. The game's commercial depicts them rising from a blue substance resembling water. In-game they thrive in the dangerous liquid.