Bullhead Parenting

The waters were churning near the eastern bridge.  At first I thought it was bugs.  Closer inspection revealed bullheads!  The Minnesota DNR site says this about them:

Bullheads ... species spawn in late spring and summer, nesting in shallow depressions in sand or mud bottoms. Soon after the eggs hatch, hundreds to thousands of black young swarm near the surface as the parents patrol the margins of the school against predators. 

I've seen the swarms of bullhead minnows in the past.  I didn't see them this time, just the parents. Could these be spawning?

Never know what you'll find at the park.

Enjoy!

~ Robin