whats eating my frogspawn

[sporty02]

Hey guys and girls I have a frogspawn about the size of a golf ball, or it was now over half of it is gone. The remaining tentacles are full and extended everyday so I think something is eating it. The possibilities are: peppermint shrimp, red mithrax, blue leg hermits, turbo snail, trouchous snail. I have no fish in the tank what is the best guess. Thank for the help

 

[Nanoguyaz]

Do you have a pic?

 

[sporty02]

not sure how to post pics. what ever it is, is also eating one of my mushrooms. everything looks healthy and water parameters are good so i dont think its dieing or dropping polyps