That's it right there Ohio...gobies do not have swim bladders and therefore cannot get off bottom(there's a hint for all you drop shotters ) Unlike shiners and shad that require chasing which burns calories, gobies are relatively easy prey. This is why slow dragging a tube jig is so effective. Smallmouth are sight feeders as well so you know that compliments of the zebra mussels, the crystal clear water helps them locate bait from long distances. The zebras are fair though...they also help shred my flouro just to keep things even!