Coral help

[leeec]

Hard to see but this has started to get smaller any ideas why has been strong and healthy all other corals are great this has just started to look poorly

 

[Dr. Peter Venkman]

Unfortunately the picture doesn't help. Try turning off the blue light and taking another picture. Also, there are many things that have to be looked at for coral health.

What type or coral is it?
How old is the tank?
How many corals do you have?
What fish do you have?
Do you have any inverts?
What kind of lights do you have?
How long have you had the coral?
What are the water parameters?