zenkatydid
Aquarium Advice FINatic
Not sure if this has been posted or is known about - just came across an interesting article concerning corals and their life-giving symbiotic relationship with an interesting organism.
http://www.sciencedaily.com/releases/2007/08/070830165013.htm
http://www.sciencedaily.com/releases/2007/08/070830165013.htm