Greeting to everyone,
I often look for opinions across a broad spectrum of experienced fly anglers to get a better sense of what may or may not be important regarding our sport. Recently, I was shown an online article regarding the creation of gas bubbles on hatching caddis. LaFontaine mentions this phenomenon in his book Caddisflies. Vern Hidy also thought is was important in fishing flymphs to dry off the fly between casts to create a "hydrofuge" (a bubble of air trapped) on the fly.

I am aware of certain species that trap air to swim to the bottom to deposit eggs, but this phenomenon occurs during the emergence of the caddis. I will post a link to the article. Some of you may have seen it, before.

The photo that intrigues me the most is the one of the hatching caddis pupa with the air bubble. Up to seeing this photo, I did not believe this even occurred since I could find no evidence of it scientifically nor photographically.

All of your opinions are most welcomed.

http://www.flyline.com/tips_trivia/all_that_glitters/

Thanks,
Mark