The Fearsome Dobhar-chú possesses a unique physiology that combines mammalian and reptilian features, allowing it to breathe underwater indefinitely while maintaining the speed and agility of a land predator. Its thick, water-resistant fur contains bioluminescent properties that activate in dark environments, creating an eerie glow that has been mistakenly attributed to other cryptids throughout history. The creature can alter its size from that of a large otter to dimensions rivaling small boats, enabling it to navigate varied waterways and terrains.

The Dobhar-chú serves as both witness and guardian of the hidden pathways connecting diverse cryptid habitats, maintaining the delicate balance between aquatic and terrestrial cryptid domains while occasionally allowing worthy cryptid hunters glimpses into these secret connections.