A friend told me about this a while ago but just sent it. Hope you haven't seen it yet. Caddisflies are remarkable for their cases they build during their larval stage. Even the ones they naturally build are amazing. But here an artist used actual jewels in the bottom of a tank and the Caddisfly just used what it had and created a remarkable piece of art. (albeit wierd)

http://seawayblog.blogspot.com/2008/...ous-story.html

I hope you find it as interesting as I did.