Hi, 
First of all thank you for your answer :) !   
I thought of adding that precision and since what you answered, I think I should have ^^ 
I know when using this move on a Tentacool that have this talent I get damage back instead of healing that I know, I took my precaution to notice that it happens against Pokemon that don't or can't have this talent.   
Kindly,   
Arkningy