Squilly

The Squilly would be a mob that spawns in caves and that could be tamed with glow ink. They are passive and can fly. Once tamed, they can guide you to ores like diamonds, gold or emeralds and can do the same in the Nether. Squillies are pretty rare and are mostly found in mineshafts and in deepslate caves. They are scared of the Deep Dark biome and would immediately find their way out of the Deep Dark biome and they will do the same if they go to the surface. TWhen tamed, Squillies can not go more far than 100 blocks away from you