Born in the lightless trenches of primordial oceans before continents divided, the Abyssal Adaro emerged as the first sentient cryptid to traverse multiple realms, using rainbow bridges to travel between sea and sky. Throughout millennia, it has appeared across countless cultures, influencing the evolution of other cryptids and leaving echoes of its distinctive features in folklore worldwide, from the shark-gods of Pacific islands to the weather-controlling serpents of mountain legends.

The Abyssal Adaro possesses the ability to shift between fully aquatic and semi-aerial forms, maintaining its shark-like dorsal fin and scale patterns while adapting to different environments. It harnesses the prismatic energy of rainbows to create dimensional portals between cryptid domains, allowing it to appear in seemingly disconnected locations across the globe. The creature's eyes constantly shift color like oil on water, reflecting the specific energy signature of whichever cryptid realm it most recently visited, while its skin absorbs and redistributes ambient mythic energies to maintain balance between cryptid ecosystems.

The Abyssal Adaro serves as both witness and guardian of the cryptid world's hidden pathways, maintaining ancient migration routes between seemingly disconnected habitats and ensuring the preservation of cryptid diversity across realms. When the balance between cryptid domains falters, it manifests more frequently in affected regions, guiding lost cryptids back to their proper realms and occasionally revealing itself to human observers who demonstrate respect for cryptid lore.