Tenuous ? And what is this other guy ?

[Eddie7144]

Hello every one , ok so I believe this big blue one is a tennis , as for this other one I'm baffled, green polpys and a some what light purple body, any guesses?? Also any tips on placement would be great, thanks as always

 

[mtraylor]

Looks like some sort of montipora to me from the edges growth.