SCP-4217 refers to both the Bismarck (henceforth SCP-4217-A), an anomalous German battleship sunk on 1941-05-27, and the large cephalopod organism that is fused to the inside of its hull (henceforth SCP-4217-B). SCP-4217-B possesses a pair of octopoid eyes which protrude from the base of SCP-4217-A's superstructure, and twelve 100- to 200-meter-long muscular hydrostats that extend from an opening in the stern. Aside from the presence of SCP-4217-B, SCP-4217-A shows no signs of damage sustained from battle or subsequent decades submerged underwater.