Topics: fantasy worldbuilding, characters, factions, relics, creatures, locations, canon.

Tags: coast, leviathan, regional.

Appearance: whale-sized sea beasts with blue-black hides, pearl reef growths along the back, lantern eyes below the waterline, and scars from old harpoons grown over with coral law marks.

Threat tier: regional by movement alone, boss if wounded into rage, and coast-changing if a herd blocks grain ships during succession unrest.

Habitat: Sapphire Coast migration lanes, Stormglass Harbor approaches, pearl banks, deep bell waters, and old sea temple routes where hunting rights are ritually limited.

Behavior: they are not malicious. They surface under ships that ignore migration bells, follow old currents, and defend calves with catastrophic force. Merchant houses often cause the crisis by chasing pearl growths too closely.