I personally think its just the Atlanteans who are long lived, I don't like when Marvel tries to tie them up with the Kree, Skrulls, Inhumans, Eternals because I feel like the Atlanteans predate all the cosmic stuff. Atlantis was the most advanced place in the world eons ago and they had their own sciences and magic. I really just want Atlanteans to have a strong connection to earth and the seas without cosmic stuff.