zoa`s brightened up after feeding?

I bought some zoas online last week. They are doing great and had good color upon arival.


Just for fun i put a few cubes of mysis shrimp in the blender with a small amount of dry seaweed. I added water and made a slurry. Put it in a syringe and gave my zoanthids a small dose. Their color has improved greatly. I am seeing hues in the different types that were not there before. Can they color up in 13 hours since the feeding or are they just finally getting acclimated to the tank? Prbably a combination of both. I tried to take photo's but man they look horrible in the photo. LED syndrome.





Has anyone else fed their zoas and noticed a change in appearance?