<a href=showthread.php?s=&postid=11475736#post11475736 target=_blank>Originally posted</a> by phender
I would say that it is H. crispa. From what you are telling us, tentacles shrinking and getting lighter, it sounds like its not happy. The lighter color could be explained by the increase in lighting and the anemone not needing so much zooxanthellae.
Yours may be the exception to the rule, but the shortening of the tentacles usually means that the anemone is not getting enough food. Maybe it needs something more substantial than mysis.