Anyone know what this creature is?

[prsnlty]

Hi, see the white thing at the bottom of this piece of live rock? Know what it is and is it okay? There are 2 aptasia here too... they'll be gone in the morning.

Thanks

 

[slapshot]

Looks like a sponge to me. As long as its not covering anything if leave it.

 

[prsnlty]

Thank you I was thinking it might be but I never saw one with what appears to be a mouth. I also have some pink and purple similar to this on other rocks but with little or no mouths. Kinda slimy feeling too.

 

[CoralReefDoc]

What appears to be a mouth is called the osculum. It allows water to flow out from within the sponge, thereby allowing more water to be drawn in and filtered thru the various pores/cells

 

[prsnlty]

What appears to be a mouth is called the osculum. It allows water to flow out from within the sponge, thereby allowing more water to be drawn in and filtered thru the various pores/cells

Thank you It is quite interesting to see in my tank. I purchased a beautiful piece of live rock that had many different sponges and plant life on it over a year ago. Then my purple pincushion sea urchin devoured it. I'm guessing these came from that rock....