[jad2t]

You have to read up on how sonar works to understand why the "hooks" are formed by larger fish. I won't bore you with the details, you can google it for yourself if you'd like. Anyway, the hooks form while passing over the fish. If you're right over fish you'll just see long black lines. The higher black area is a bunch of smaller dots so thick it forms what almost looks like a false bottom. That would be the shad. Underneath it would be the predatory fish. Whether they were white bass, hybrids, rockfish, we'll never know because I never got one before the battery died haha.

I often see the hooks formed when I'm paddling fast and pass over fish but when I took that screenshot I was sitting almost still as there was no wind.