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.
"When Samus comes close, they fall fluttering downward."
- It is unknown if they became X Parasite hosts, as Samus did not encounter any Octroll-X in Metroid Fusion.