German ocean liner General von Steuben was torpedoed by a Russian submarine in 1945 taking thousands of refugees fleeing the advancing Red army with her to the bottom. She now rests at 72 meters in the Baltic Sea making it one of the most impressive Baltic wrecks and daunting technical dives.
Don't compare them to the simple rubber suction cups on kids' toy dart guns; these have their own elaborate muscular regulatory mechanisms. This diagram illustrates the internal structure of a single octopus sucker.
There are two main regions, an infundibulum (IN) on the attachment face of the sucker, and a deeper chamber called the acetabulum (A) (if you don't recall any Latin, "infundibulum" just means "funnel", while "acetabulum" is "vinegar cup"â anatomy is littered with funnels and cup-shaped structures, so these are actually very generic names).
