Creatures who are tamed in caves are marked as cave creatures after tamed so other cave creatures won’t aggro on you unprovoked. It works on Pulmonoscorpius, Araneo and centipede, Dire Wolves, Dire Bears the last time I checked. But you need to tame them while they still in the caves. Kill and resurrect at Obelisk won’t work
Koko will u tame an basilosaurus soon bc they gather ink in them which acts like oil and basilosauruses have a ability to make u immune to cold in deep waters