wat do u mean by stressed out?
do u mean it closed up?
if so then yes its norma, cause if u think about it wen u touch a coral or an anenome it hides, or shrinks cause its defending itself and is scared
i got a coral today and my clown went to host it and the coral would never come out, but after like 2 hours it got use to him and he opened up
if u go to the photos thread, and look for "Vic's 55 gallon" u can c my tank and my clown hosting his new coral