Potomac River

There's also a population of them in Octorura Reservoir in Pennsylvania, and that's where it goes up into small streams as well to spawn.

It was once found in the Potomac River in Maryland and parts of Virginia, but we now think it's completely extirpated from the Potomac River, and its only habitat is in the Susquehanna River above and below Conowingo Dam.

Above Holtwood Dam is actually a type of locality where the fish was first collected when it was inscribed.

When I first came to Penn State 47 years ago, in 20 Mile Creek and 12 Mile Creek, you could almost walk across the backs of the log perch.

And so you have both Ethiospina species as well as perch sinus species, which are all in the perch family, two different genera, but are found in the same habitat and with the Chesapeake log perch.

Okay, thank you.

We've mentioned that this fish, we currently can find it in like the lower Susquehanna that's been extirpated from the Potomac.

You touched on invasive species, but was there anything else that led to this extirpation?

And so the data set covered 73 professionals across eight 2025 Bass Pro Tour events.

And some of those include, you know, really big, you know, lakes, Lake Conroe, Lake Murray, the Potomac River, Lake Guntersville, you know, big ticket, high class, world class bass fisheries.

and the way that the bass pro tour works is that every scorable fish is weighed and then released on the spot.

So the data includes every catch, not just a five fish limit.

OK, but the effects did differ significantly depending on the venue.

Sure, sure.

So, for example, lakes like Lake Conroe and Lake Murray showed very tangible increases in catch rates during FFS periods, whereas lakes like the Potomac River and Lake Guntersville actually didn't really show a statistical advantage at all.

Okay,