Nereidic Tidal Dragons, also known as Abyssal Weavers, are mythical sea creatures first sighted during the Great Sundering tsunami. They are elongated, wingless amphipteres measuring 60 to 80 feet and are believed to be rare, known mainly by deep-sea merfolk. With a lifespan of up to 1,500 years and a distinctive gelatinous skin that shifts colors, these apex predators possess abilities like a high-pressure fluid cutter and bioluminescent ink. They inhabit abyssal plains and volcanic trenches, displaying solitary behavior except during rare mating events. Their cultural lore suggests they guard oceanic secrets, and they are associated with maritime superstitions, believed to bring death where glowing waters appear. Famous individuals include Abyssal Coriolis, linked to rogue waves affecting shipping routes.