![northern pike](https://images.dnr.state.mn.us/fisheries/fishes/smelt/rainbow_smelt.jpg)
The population of this invasive species peaked in the 1970s. With Lake Superior restored to a more natural state, these silver-colored fish, 6 to 9 inches long, no longer bring thousands of netters to the North Shore for the spring smelt run.
![Fish being properly released after being caught](https://images.dnr.state.mn.us/fish_wildlife/features/catchandrelease.jpg)
A helping hand
Fish populations don't grow as fast as demand. Practice some natural recycling on your next trip.
Learn how »