shouldnt matter if hosted or not... They are aggresive once settled in, so if you have pricey fish be prepared possibly lose them... IMO I would go for it, love nems, specially gigs
I have never heard of anyone losing a fish to a gigantea. Their sting is not nearly as strong as a haddoni. Haddoni on the other hand are strong enough to catch and eat fish.
That anemone is bleached but that is not a big concern. It looks reasonably good for gigantea newly import and in LFS.....
Well I pulled the trigger and picked it up last night. Settled in right away. Picture is from 1 hour after it was put in. It made its way to close to the top of the rock over night. Its roughly 10" across there is the pic.