Dolly Varden, a species of char, compete for food in a small Alaskan creek. The small fish four to ten inches in length feed on aqatic insect carried past by the current.
I used an old Aqua-Vision underwater housing built for an old Nikon F3 35 mm film camera. By gutting the housing, I was able to accomidate a high quality digital NiKon D3s. The camera is triggered by remote control.