Some times you just have to fish the wreck to find out. My depth finder just shows a rise in the bottom when I go over a wreck. My advice would be to fish it. A lot of the smaller fish will be under it and the bigger ones will be cruising around itl. There fore, it will be tough to judge that there are fish there by the depth finder alone. You have yto experiment. If the tide and wind anren't too much, drift over the reef and mark the spot where you start getting hits.

Scott Meier
White Oak Lodge