Siege Monster. The dunkleosteus deals double damage to objects and structures. Water Breathing. The dunkleosteus can breathe only underwater.
Bite. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 31 (4d10 + 9) piercing damage. If the target is wearing heavy armor, it takes an additional 11(2d10) piercing damage.
Marine