Karim's in wall 380g tank

small but loveable

<a href="http://s1062.photobucket.com/user/karimwassef/media/488C491D-A8FA-443A-809E-80DC5B545EA9_zpspa2x06oy.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/488C491D-A8FA-443A-809E-80DC5B545EA9_zpspa2x06oy.jpg" border="0" alt=" photo 488C491D-A8FA-443A-809E-80DC5B545EA9_zpspa2x06oy.jpg"/></a>
 
<iframe width="560" height="315" src="https://www.youtube.com/embed/H6G1ctheRFo" frameborder="0" allowfullscreen></iframe>
 
my sea biscuit is a great garbage collector.. looks like it found a stainless steel pin from the internal impeller of a powerhead?

<a href="http://s1062.photobucket.com/user/karimwassef/media/DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg" border="0" alt=" photo DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg"/></a>
 
bubbling along as I over-aerate while adding chemiclean

<a href="http://s1062.photobucket.com/user/karimwassef/media/EC4FDDAE-A245-418A-9E09-6F996C264439_zpsbosregij.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/EC4FDDAE-A245-418A-9E09-6F996C264439_zpsbosregij.jpg" border="0" alt=" photo EC4FDDAE-A245-418A-9E09-6F996C264439_zpsbosregij.jpg"/></a>
 
karimwassef said:
my sea biscuit is a great garbage collector.. looks like it found a stainless steel pin from the internal impeller of a powerhead?

<a href="http://s1062.photobucket.com/user/karimwassef/media/DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg" border="0" alt=" photo DEB864DA-EC2E-427E-8840-80757D04DD4A_zpsnuc9vv4o.jpg"/></a>
Click to expand...

Here it is at night- naked and exposed!!

<a href="http://s1062.photobucket.com/user/karimwassef/media/D61FC657-BF82-412E-9DEF-ED650CD5AF9F_zpsosohp2z9.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/D61FC657-BF82-412E-9DEF-ED650CD5AF9F_zpsosohp2z9.jpg" border="0" alt=" photo D61FC657-BF82-412E-9DEF-ED650CD5AF9F_zpsosohp2z9.jpg"/></a>
 
And other secretive life:

<a href="http://s1062.photobucket.com/user/karimwassef/media/1A64AF17-F472-4A83-AABC-2435B253394B_zpsqniuusjx.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/1A64AF17-F472-4A83-AABC-2435B253394B_zpsqniuusjx.jpg" border="0" alt=" photo 1A64AF17-F472-4A83-AABC-2435B253394B_zpsqniuusjx.jpg"/></a>

<a href="http://s1062.photobucket.com/user/karimwassef/media/937C946B-ABF2-4585-B619-6EC9017E7544_zpsk09dgrft.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/937C946B-ABF2-4585-B619-6EC9017E7544_zpsk09dgrft.jpg" border="0" alt=" photo 937C946B-ABF2-4585-B619-6EC9017E7544_zpsk09dgrft.jpg"/></a>

Tunicate or sponge?

<a href="http://s1062.photobucket.com/user/karimwassef/media/BB7E7973-586B-48E3-A009-CCE8750D832F_zpswraul2uo.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/BB7E7973-586B-48E3-A009-CCE8750D832F_zpswraul2uo.jpg" border="0" alt=" photo BB7E7973-586B-48E3-A009-CCE8750D832F_zpswraul2uo.jpg"/></a>

<a href="http://s1062.photobucket.com/user/karimwassef/media/FEB0EDFF-42FC-4C91-A0B3-3C38DC28D1C1_zpsowyd6jpb.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/FEB0EDFF-42FC-4C91-A0B3-3C38DC28D1C1_zpsowyd6jpb.jpg" border="0" alt=" photo FEB0EDFF-42FC-4C91-A0B3-3C38DC28D1C1_zpsowyd6jpb.jpg"/></a>
 
<a href="http://s1062.photobucket.com/user/karimwassef/media/A753FBA8-F40A-4F51-B6F6-89D77B39DEA4_zpsuuylrosi.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/A753FBA8-F40A-4F51-B6F6-89D77B39DEA4_zpsuuylrosi.jpg" border="0" alt=" photo A753FBA8-F40A-4F51-B6F6-89D77B39DEA4_zpsuuylrosi.jpg"/></a>
 
<iframe width="560" height="315" src="https://www.youtube.com/embed/yoq5A6XEvyE" frameborder="0" allowfullscreen></iframe>
 
pretty pink sponge

<a href="http://s1062.photobucket.com/user/karimwassef/media/E53DDD9E-8EEF-4327-A893-5389BEE26BDF_zpsngwe0kox.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/E53DDD9E-8EEF-4327-A893-5389BEE26BDF_zpsngwe0kox.jpg" border="0" alt=" photo E53DDD9E-8EEF-4327-A893-5389BEE26BDF_zpsngwe0kox.jpg"/></a>
 
ok... I have pink invaders now. I think they're tunicates?

<iframe width="560" height="315" src="https://www.youtube.com/embed/vngRWiQhLfY" frameborder="0" allowfullscreen></iframe>
 
I don't know... here's an image from a website on tunicates

didemnum-commune-wb01-600x400.jpg


http://www.european-marine-life.org/32/photo-didemnum-commune-wb01.php
http://www.asnailsodyssey.com/LEARNABOUT/TUNICATE/tuniSett.php
 
I found this description on another forum:

"Tunicates are higher up the evolutionary ladder, they have organs for circulation, digestion and even have a spinal cord. Sponges have none of that.

Visually, sponges are usually uniform in structure (I mean what makes up their structure). Closeup they have various openings to create water currents to help bring in food and remove waste.

Colonial tunicates use the same idea, they create an incurrent and excurrent siphon for flow. However when you look closely, you can see what almost looks like "veins" within. Tunicates also look more gelatinous as they are enclosed within a thin membrane."

so... I think I see vein-like structures and flaps - unique organs to tunicates, not sponges.
 
Whether a tunicate or sponge I can't say exactly. But I do know that I see them in my tank as well. And they are filter feeders. And they will bind your rocks together quite well. :0) All in all, they seem like very good creatures to have in your reef.
 
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