![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)
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
![Fishes . Fio. 417.—Crystal Darter, Crystallaria aspreUa (Jordan). Wabash River. banks of the Mississippi. Still more transparent is the smallsand- darter, Ammocrypta pellucida, which lives in the clearestof waters, concealing itself by plunging Fishes . Fio. 417.—Crystal Darter, Crystallaria aspreUa (Jordan). Wabash River. banks of the Mississippi. Still more transparent is the smallsand- darter, Ammocrypta pellucida, which lives in the clearestof waters, concealing itself by plunging](https://c8.alamy.com/comp/2AWY345/fishes-fio-417crystal-darter-crystallaria-aspreua-jordan-wabash-river-banks-of-the-mississippi-still-more-transparent-is-the-smallsand-darter-ammocrypta-pellucida-which-lives-in-the-clearestof-waters-concealing-itself-by-plunging-into-the-sand-itsscales-are-scantily-developed-as-befits-a-fish-that-chooses-this-fia-418sand-darter-ammocrypta-clara-jordan-meek-des-moines-river-method-of-protection-and-in-the-related-ammocrypta-bcani-ofthe-streams-of-the-louisiana-pine-woods-the-body-is-almostnaked-as-also-in-loa-vitrea-the-glassy-darter-of-the-pine-woodsof-north-caro-2AWY345.jpg)