I was asked by a friend if I knew of a website geared towards kids that explains, "kid friendly information on fish, coral, and ecological issues around coral death?"
not sure what target age you are looking for in 'kid-friendly', I am looking some of these over myself for my 7yo. If I find anymore I find specifically worth reading, I'll add. Great topic BTW... hoping to see some great links added here.
I ran into this site today and it reminded me of this thread. It may not be exactly what you are looking for but the fish quiz's are pretty cool and can be fun for kids: http://www.pbcrrt.org/PBFQ_01.shtml