left it for about 1/2 hr. Fish collected on it quite readily. It occupied almost the entire width of the shelf and was placed about 2-3' from the shelf ledge. Rocks and the metal frame, however, prevented it from resting completely on the ground, so fish frequently went under it, also. After ca 1/2 hr., we lifted the seine and found that this procedure is quite successful- few fish swam off the seine. Over 150 fish were captured at this time. These were placed in styrofoam coolers and the seine was put back on the shelf while other equipment was being set up. We used a small show aquarium and attachments in the aquarium to hold fish and provide a background (with mm ruler) for slides that were taken. In this way, the fish can be measured and (hopefully) sexed without unnecessary handling - esp. of large numbers of individuals. In this first attempt at this method, we did not have supplementary light and so I had to open the camera (Exa) as much as possible and hope for the best. I was using a wide angle lens w/out Polaroid lens. Setting - 3.5 + 25. ASA 64 Ectachrome used. Light reading originally ~ 4.5. Rope was used to keep the fish away from the corners & bottom of the aquarium - styrofoam will be used in the future. I found that the fish did not remain sideways, becoming vertical, facing the camera, and bending in such a way as to make measurement of some from the slides apparently impossible. Using hand pressure to further limit their movement by changing the distance between the white background and the front glass from ~1 1/2" to 1-3/4"