Eel or lamprey or hagfish. Wish we had a better view of the mouth.
Swatara, as in Swatara creek literally means "where we feast on eels" in Susquehannock. Eels go out to the ocean to breed and return to live in fresh water, the opposite of salmon. At least in the Susquehanna River watershed.
I haven't bee to Struble in ages. Years.
Depth map
https://usa.fishermap.org/depth-map/struble-lake-pa/
Struble lake structure map
https://www.fishandboat.com/Conservation/Habitat/Documents/Lake-Plans/struble.pdf
2020 trap net study Struble lake...
Ghost riding (as they call it) was fun a couple times but going up stream in the creek was why I banged away on this for a year and a half. Come summer, I'll motor up to the riffles, jump out and drag through, then motor though the next run and pool...
Don't need a shuttle buddy or service...