Eternal2

When this ship sinks, do not remove it from the game. Instead, place it docked with no masts at your home island; its crew remain onboard but any treasure or other cargo (including equipment) that it carried is treated as if the ship sunk normally. You may repair the ship as normal at your home island. When a sea creature with this keyword is eliminated, do not remove it from the game. Instead, place it docked with no segments at your home island; it may then be given repair actions (like a normal ship) until it leaves your home island.

Octopus8

(Kraken and Octopus keywords are considered identical and interchangeable, even though their names are different.) A ship with this keyword printed on its deckplate card is a sea creature. At any time during your turn if your kraken is within S of an opponent's ship, it may surround that ship as a free action; place the kraken under the ship so that its tentacles surround the ship. If there is more than one opposing ship within S the kraken can surround only one at a time. It cannot surround a docked ship or another kraken. A surrounded ship cannot be given a move action until the kraken is eliminated or moves away. A kraken cannot shoot or be shot at unless it surrounds a ship; it can shoot at only the surrounded ship and only the surrounded ship can shoot at the kraken. A kraken cannot shoot on the same turn it surrounds a ship. If you have Captain Davy Jones (PotC-057) in your fleet, you may use his ship's action for the turn to declare an opponent's ship the target of a kraken. That kraken gains +S to its base move but it can only shoot at the targeted ship (it may still surround other ships). The chosen ship remains the target until a new target (or 'no target') is declared, the targeted ship sinks, or the kraken is eliminated.