The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
A dyed (as in injected with yellow dye) sebae anemone.
DyedCorals
"Artificially dyed yellow sebae anemones are perhaps far and away the most common perpetration of the act. Like carpet anemones (Stichodactyla sp.), sebae anemones are naturally brown or green colored (other rare colors too, but NO yellow)."