I don't recall anything about the dorsal fin(s). There were so many flashing, and I wanted to get a pic, and cast again.
I just never noticed a fish flash like that on this stream before, but the Sun was bright, and the water so clear. If I had my underwater camera and a boom, I could have taken video of the pod of larger fish. I'm going to assume sucker, as they moved like suckers. They were awfully large, however.
That section of the Neshaminy is loaded with pumpkinseed (the tidal section). I don't see too many above the tidal section, where the dominant little fish is rock bass. I've never seen a rock bass in the tidal section.....
It is 47 miles of pretty sweet fishing!
P.S. No indicator used or needed on that Green Weenie. The fish in the tidal section hit harder than anywhere else around here.
Here's a pic of that section during winter:
The pool I fished is a few yard above the rocks on the left. When the tide goes out, that stream can drop to inches in many spots, but that pool remains deep.
The bank on the opposite side remains a couple feet deep as well during low tide, and the middle can be as little as ankle deep. Works out for me: stand in the
middle and cast to the edges.