Plate coral looking funny help!

[Alvin88m]

My plate coral had this tumor looking bible underneath it it looks weird to me. Does anyone know if that's normal?


URL=http://s39.photobucket.com/user/alvin88m/media/Mobile%20Uploads/image_zps989c6353.jpg.html]

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[aromano]

not sure what you are referencing in the picture

 

[Alvin88m]

not sure what you are referencing in the picture

If you look in the part where it the green tentacles aren't touching the sand right underneath it there's a big purple bible and that's why I talking about. I wish I could have gotten a clearer picture

 

[Alvin88m]

Here's another picture. If you look at the bottom. The whole bottom it's like a whole pocket of air I guess. I'm pretty sure that's not good.