white sucker fish
redhorse sucker fish
Suckers will spawn in spring in shallow water like under this bridge. The females, larger in size, in this video swim sideways and backward down the river as they release the eggs. The males, smaller in size and with stripes, "herd" the female, or cluster near her, and fertilize the eggs as they are released. From up above it looks like a pile of fish. Enjoy!
Learn more by visiting:
http://www.dnr.state.mn.us/fish/whitesucker.html