If you ever watch Disney cartoons, the most trouble a tentacled creature can cause is the occasional face suction of Donald while fishing, or Goofy while water skiing.
Yeah, there's the giant squid in 20000 Leagues, and Ursula the sea witch is part octopus, but I see those as aberrations. I mean, the Japanese eat LIVE octopii, and they don't seem to suffer one way or another. Unless you count their sex-pervert comic books, but I hardly think that's the fault of an octopus or squid.
Recently, it's come to my horrified attention that octopii are the smartest creatures, excluding mammals (Mammals rule!) in the wide sea. Now as you watchTHISvideo, I challenge you to think on our friend the giant squid (Caught on Film in it's natural habitat for the first time in history, and pictured above) who can grow to be over 100 feet in length
100 feet. Sperm whales are attacked by these guys.