Threatened Habitats: coral reefs

Chris, I'm not sure this will cut out the "fancy" stuff, but give it a try using the Google search engine with these searches:

~tutorial corral reefs
and
~basics corral reefs
Use that tilde attached to both words since in Google it will give other words like tutorial and basics. Then using the same searches attach the word threatened at the end to see if it provides more hits.

Hope you find what you want. Regards, Pat aka Patrick