Plate coral swelling

[Scotty Fraiser]

I have a plate coral that was unusually big today. Have had it for about 6 months with no problem at all. Feed it a shrimp about every ten days. I know they swell and shrink but today it was really bigger than normal. What is it doing? Color looks great.

 

[Daniel Fishy]

Could feel threaten or just showing off. Mine did that once and it was like 5 times it normal size. Normal tho and fine just freaky when you see it.

 

[Sniperhank]

Mine does this as well at times. It could be just because, but they also inflate to move around.