ID help!!

[BMahura]

I put a rock into my fuge from my display last week and was just checking out the life before the lights came on in a fuge and found this creepy looking thing. It had about 6 long tentacles which looked to be coming out of its head and when I shone the light on it to get a better look they slowly retracted. Does anybody have any idea what this is!ImageUploadedByTapatalk1338996488.711521.jpg