![Corey Dunn on Twitter: "Another great spot for darters is inside bends. If substrates are sandy, look out for two species of aptly named – sand darters. If substrates are primarily small Corey Dunn on Twitter: "Another great spot for darters is inside bends. If substrates are sandy, look out for two species of aptly named – sand darters. If substrates are primarily small](https://pbs.twimg.com/media/DkEwbehUwAA7G0C.jpg)
Corey Dunn on Twitter: "Another great spot for darters is inside bends. If substrates are sandy, look out for two species of aptly named – sand darters. If substrates are primarily small
![Corey Dunn on Twitter: "Meet the Crystal Darter. It inhabits deep, swift shoals in big rivers only effectively sampled by trawl. This endangered fish's body is clear, but future is murky. Good Corey Dunn on Twitter: "Meet the Crystal Darter. It inhabits deep, swift shoals in big rivers only effectively sampled by trawl. This endangered fish's body is clear, but future is murky. Good](https://pbs.twimg.com/media/EA411iKX4AA21Gl.jpg)
Corey Dunn on Twitter: "Meet the Crystal Darter. It inhabits deep, swift shoals in big rivers only effectively sampled by trawl. This endangered fish's body is clear, but future is murky. Good
![Iowa DNR on Twitter: "No, this isn't a baby fish. It's an adult crystal darter, a rare find! Our crews have documented crystal darters in Pool 13 of the Mississippi River for a few years. They live in course sand, pea gravel & glacial till. More info: https://t Iowa DNR on Twitter: "No, this isn't a baby fish. It's an adult crystal darter, a rare find! Our crews have documented crystal darters in Pool 13 of the Mississippi River for a few years. They live in course sand, pea gravel & glacial till. More info: https://t](https://pbs.twimg.com/media/E-uhKh-WYAYtKbt.jpg:large)