Strange coral behavior I'm noticing...

[wartooth1]

So at the moment, I have 4 corals in my tank: Green Button Polyps, Star Polyps, Frogspawn, and a Bullseye Mushroom (which I just got a few days ago). So since I've had the mushroom, I noticed that every day at 6pm the mushroom would close up for a little while and then open again. And now, All my corals (except the button polyps) would close up at 6pm and then slowly open up again over the course of the next 2 hours.
Any ideas what could be causing this or do corals have some kind of internal clock? Its funny how only the mushroom was doing it but now all but one of my corals are doing it too... and they all do it at the same time around 6pm.

 

[flower]

Quote:
Originally Posted by Wartooth1 http:///forum/thread/386759/strange-coral-behavior-i-m-noticing#post_3398866
So at the moment, I have 4 corals in my tank: Green Button Polyps, Star Polyps, Frogspawn, and a Bullseye Mushroom (which I just got a few days ago). So since I've had the mushroom, I noticed that every day at 6pm the mushroom would close up for a little while and then open again. And now, All my corals (except the button polyps) would close up at 6pm and then slowly open up again over the course of the next 2 hours.
Any ideas what could be causing this or do corals have some kind of internal clock? Its funny how only the mushroom was doing it but now all but one of my corals are doing it too... and they all do it at the same time around 6pm.
It take about all day for a coral to feed, when they do, they close up around the food and then reopen. This is why power heads are needed. The coral waits for the food to accumulate on thier sticky feelers or little disc face....the water current brings the food to them.

 

[wartooth1]

Ah, well that explains why the button polyps didn't close then... they close up and re-open throughout the day especially when I'm feeding the tank.
In that case... seeing as how all the other corals close and re-open together at the same time of the day... they must all be well fed