Octobot

Octobot is a octopus badnik with blue/gray skin, red eyes and eight drill-like tentacles.

Far beneath the surface of the Great Mobian Ocean rests an underwater bot base - home of the malicious Octobot, a giant blue mech squid that serves as one of Robotnik's underbosses! In fact, Octobot's existance under the seas would have remained unknown to the Freedom Fighters had Tails not encountered him during the maiden voyage of the Sea Fox. Octobot hates Tails with a passion almost as strong as Crocbot and would also gladly kill him for virtually ruining his many plans. Discovering the underwater roboticisation factory once mainted by Jaws ( One of the badniks from Sonic 1), Tails destroyed the submerged base and left Octobot a complete laughing stock among the Bot community. However what Tails didn't know was that Octobot wanted revenge - and while on a mission to prove himself in Downunda, Octobot scuttled the Sea Fox by puncturing it with his drill tentacles and drug Tails beneath the ocean in an attempt to drown him. Tails was rescued by The Forty Fathom Freedom Fighters - a group of underwater FF's and later saved, but Octobot's fate during the rescue? Crushed beneath the massive weight of thier largest member - Fluke The Blue Whale. Octobot survived the incident - though somewhat flat - and hasn't been seen since: most likely stewing in his own juices over revenge. But it is known that he is not completely destroyed and still continues to hold a huge grudge against the guy that started it all - Tails The Fox.