As an additional cost for you to move from one Ocean location to another while not in a vehicle, you must spend 2 actions.

Forced - When your turn begins, if you are at a fully flooded location, you struggle for air: When your turn ends, if you did not enter an unflooded location, partially flooded location, or a vehicle during your turn, take 5 direct damage.

Spawn - Fishing Vessel's location.

Hunter. Massive. Retaliate.

The Terror of Devil Reef cannot enter Cave locations.

Forced - When The Terror of Devil Reef would be defeated: Instead, remove all damage from it and exhaust it. It cannot ready for the remainder of the round (including the upkeep phase).