Red Tip Hermit Crab on Green Bubble coral

[puks]

Hi,

Last several days my Green Bubble Coral doesn't open as much as previously. And today I found Red Tip Hermit Crab on it.

Also there is a kind of moss on a rock the coral located.

Should I change anything?


Thanks

 

[reefndude]

Usually reef safe hermits will eat dead tissue or debris that may be on the coral. Is the red tip like the red legged?

 

[puks]

I thought they are the same. It's the red legged one.

I can also see that the tissue is shorter from one side.

Is it usual or I should do anything to prevent this?