Sunfishes of the Lower Susquehanna River Watershed

Throughout the lower Susquehanna basin, four commonly encountered Lepomis sunfishes are gathering in the shallows of lakes and ponds and in the pools of the regions streams and rivers to spawn.  As water temperatures surge into the upper sixties and seventies, you’ll see them from the shoreline as the colorful male sunfish clears a nest depression to attract and court one or more egg-laying females.  After the eggs are laid and fertilized, the male relentlessly guards the nest against trespassers, which can include other males protecting their scrapes located just a few feet away.  A colony of nesting sunfish can include multiple species—hybridization does occur.

So grab a pair of close-focusing binoculars or a camera and go take a look.  Because they generally thrive in clean, warmwater streams, you might be able to find all four of these Lepomis sunfishes in the waters near you.

Lepomis Sunfishes of the Lower Susquehanna
Fishwatching 101-  These four species of Lepomis sunfishes are found throughout the lower Susquehanna watershed.  The Pumpkinseed and the Redbreast Sunfish, both natives to the river and its tributaries, may be the most beautiful fish found in our region.  Click the image to see an enlarged version marked with key field identification points.
Largemouth Bass
While you’re searching for sunfish, don’t be surprised to find Largemouth Bass, another native transplant introduced from the Mississippi River drainage basin, lurking in the shallows.  Their spawning period began as water temperatures reached the low sixties.  Soon, they and their young will be feeding on the newly-hatched sunfish produced in nearby nests.

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