Coral Banded Shrimp actually will take their own legs and/or claws off to avoid aggressive behavior from other inhabitants. They will grow back and should be normal in size. There is a video on youtube of a person that had a coral banded shrimp in with their mantis shrimp...the CBS kept handing the mantis body parts...I didn't finish watching the video because I knew what would happen...but it was neat to observe the behavior of the shrimp.