Iowa biologists have captured two wild pallid sturgeon in the Des Moines River, the first time the federally endangered species has ever been documented in that waterway. The fish were collected a week apart below the Ottumwa dam during routine spring 2025 sampling, and genetic testing confirmed they were not hatchery-raised. The discovery offers a rare sign of natural persistence for a species whose wild population remains critically low, but the same stretch of river has a troubling history of fish kills tied to degraded conditions.
First Wild Pallid Sturgeon in the Des Moines River
The find was detailed in an Iowa DNR announcement on August 26, 2025, which described it as the first documented collection of pallid sturgeon from the Des Moines River. Biologists captured the two fish during the agency’s annual spring sturgeon sampling in the lower river, below the Ottumwa dam. The specimens were caught a week apart, suggesting the fish were not merely a single stray pair moving together but were using the habitat independently.
What makes the discovery especially notable is the genetic confirmation. Testing showed both fish were of non‑hatchery origin, meaning they were wild-spawned rather than products of the stocking programs that account for most pallid sturgeon detected across the Missouri River basin. For a species that has depended heavily on artificial propagation to keep its numbers from collapsing entirely, finding wild individuals in a tributary outside the Missouri mainstem is a significant biological signal. It suggests at least some natural reproduction and survival are occurring somewhere in the system, even if scientists do not yet know exactly where these fish hatched.
An Ancient Fish on the Edge
Pallid sturgeon are among the oldest lineages of fish on the continent, often described as “living fossils.” According to a federal fact sheet, the species existed long before humans and retains many primitive characteristics, from its bony scutes to its elongated, shovel-like snout. Pallid sturgeon were formally recognized as distinct in 1905, having previously been grouped with the closely related shovelnose sturgeon.
That similarity still causes confusion for anglers, which carries legal consequences. Of the three sturgeon species found in Iowa waters, only the shovelnose may be harvested. Both lake sturgeon and pallid sturgeon must be immediately released unharmed if caught. Misidentification can lead to unintentional violations of state and federal law, so fisheries staff emphasize careful identification and encourage anglers to photograph and report any suspected pallid sturgeon encounters…