Yuma sting reach?

[TL1000RSquid]

Just recently got my first half dozen yuma's, I placed them within 1.5-2" of some colt, now the colt is starting to look kind of beat up but I'm not sure if its getting stung or it just because the clownfish beating on it all the time.

 

[organism]

I've seen sweepers on yumas before but only about .5-1" max on the sides... The thing is they can really vary in size depending on their mood. Are they opening up a lot at the end of your light cycle or at night maybe?

 

[TL1000RSquid]

They do inflate pretty big later in the afternoon. Wasn't sure if they had sweepers or did chemical warfare or not, I'm use to Florida Ric's which I always did ok for me next to peaceful corals. Didn't want to move them if I didnt have to goby and pistol shrimp already made a home under the rock was a great spot for them all food the clowns tried to feed the colt fell right in front of their cave.