Green Brittle Star

[finest]

Help! I purchase a Green Brittle Star after Acclimation I put it on my tank then after an hour I see that the tentacles of my Green Brittle Star is slowly cutting offââ"šÂ¬Ã‚¦ then I see the tentacles all of five tentacles tip is off

 

[Monkeyfish]

If I understand your post correctly his arms are disintegrating or have been removed from his body. Sounds like he wasn't acclimated properly or something had a go at him. What else is in the tank and what are your water parameters?