Tentakil may seem like a nice guy at first. Sure, he'll take you out for a night on the town: dinner, dancing, a movie... the whole shabang. Then maybe he'll compliment your chassis' color-scheme or tell you that you have the most stunning optics he's ever seen. Then, of course, one thing will lead to another, you'll ignore your better judgment, invite him back to your place and then BAM! He takes your head clean off. Decepticons. They're all alike.
Tentakil can combine with his fellow Seacons to form Piranacon.
Years later, he stopped hiding his cruelty from even Decepticons. Wonder what could have caused that?
His alt-mode is n Upright walking Squid.