New Member in tank need identification

[cenzo]

Seen this on my glass today is this a star fish?

 

[Unarce]

Asterina star. Run a search, and then decide whether or not you can live with them. They seem harmless, accept in plague proportions.

 

[Anonymous]

Seconded..that's what it is.

 

[waymack97]

they split very fast. 1 will become hundreds in less then a year. if they become a problem a harliquin shrimp will make short work of them.
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Group insurance Forum

 

[cenzo]

Would they do this they seem to be fine three weeks ago but they look like they may me on the way out?

 

[Anonymous]

Huh, those zoas look bleached to me rather than chewed on.

 

[cenzo]

What makes them bleach

 

[Anonymous]

Here's a link to an in depth article if you are interested on bleaching in the reef environment...

http://www.marinebiology.org/coralbleaching.htm

The short version is it is usually a stress reaction that causes the coral to loose its symbiotic zooxantheallae and thus look "bleached". Water quality, heat, new lights/older bad lights, coral chemical warfare could all be causes.