You're not getting many replies because most of us feel that if we can't add value to the conversation, we don't want to waste people's time by reiterating what's already been said.
I can only point out the obvious: bleaching is lack of color. But unlike coral where for the most part bleaching means the coral is white and dead, anemones that are bleached can still be alive and have color of some sort. They lack their symbiotic zooxanthellae -- which is typically brown or green -- and is essential to keeping the nem alive. Without zooxanthellae, the nem will die.
Specifically with haddoni, the brown color is much less pronounced as with other nems, such as gigantea which have a brown base color and an accent color on the tips of the tentacles which is typically green, blue, brown or purple. Haddoni that are bleached appear to be somewhat transparent but still have color throughout their oral disc and tentacles (in contrast to gigs) which is typically red, purple, blue, green, or brown. Brown haddoni and gigs can appear white or transparent.
Your haddoni appears to be completely bleached in the photos. In the first photo it even appears to be transparent. You cannot see "through" a healthy haddoni, which has an ample amount of zooxanthellae.
I hope that helps!
