Mimic and wunderpus probably have decent distributions, but they live in habitat that is heavily trawled in some places, and sometimes "reclaimed" to make land. Although we have not been able to conduct formal surveys yet, these octos are considered rare. When solitary animals are rare, and might not get many chances to mate in life, over-collection can be a big deal. Based on views of long-time divers in muck sites, paoching of rare animals for the aquarium trade (of mimics, wunderpus, frogfish, etc) has become a big, unchecked problem. Rich muck habitats don't have the charismatic draw that coral reefs have, so they get ignored by conservation groups that admittedly already have a lot on their plate as it is. Wunderpus and mimics have different ways of dispersing hatchlings, so wunderpus would probably have a harder time bouncing back after over-collection