They look high enough up in the water column that you could do a big water change and while the water level is low spray them with 3% H2O2 right out of the bottle (no diluting). Allow 10min dwell; no rinsing is needed for these then fill the tank. They will fizz a bit then the BBA turns greyish white or sometimes purplish pink & dies in a few days. After about a week you can rub them with your fingers, or a toothbrush, or some of the fish will peck at it to remove it.
Or you could remove them as stated and dip. However, I've had great success on anubias by dipping 5min in straight 3% H2O2 (no diluting) then plop them right back in the tank...no issues (roots & all).