Giant Seahorse is a Large beast with unaligned alignment and Challenge Rating 1/2 in the 2024 SRD. This stat block includes AC 14, 16 hit points, speeds, traits, and actions.
Ram - Melee Attack Roll: +4, reach 5 ft. Hit: 9 (2d6 + 2) Bludgeoning damage, or 11 (2d8 + 2) Bludgeoning damage if the seahorse moved 20+ feet straight toward the target immediately before the hit.