If I saw that on my graph, I would assume it was a congregation of small fish and would proceed accordingly. I would use very small lures and jigs. Notice there are not many large red arches of big game fish. The large number of black marks indicate there are not a lot of strong returns. This is typical of a group of small fish. If you are just targeting striper, then it is time to find another group. It is hard to stress too much that you should keep moving until you find a group of larger fish before you start fishing. I'm not talking about running the lake. Sometimes two more boat lengths is the difference between wasted time and bonanza. Non't give up and keep moving.