Identity
Once included with Ozark Madtom, this species was formally separated in 2006 using genetic evidence. Ordinary external appearance cannot reliably distinguish the pair. Ozark Madtom occupies the upper White River system instead.
Size and Weight
Missouri’s field guide reports an upper adult length around 5 inches. The original species summary lists an 8.1 cm standard-length specimen, which excludes the tail and is not directly comparable. A verified maximum weight was not found.
Habitat and Natural Food
Permanent, clear flow over gravel and rock supports its habitat. It shelters during the day and searches the streambed at night, eating immature midges and mayflies among other foods. It is associated with medium-sized and larger Ozark streams rather than the smallest headwaters.
Observation and Fishing Context
The species is chiefly of native-fish and natural-history interest. Record the river system along with photographs when documenting it; a photograph alone may leave identity unresolved. No tested recreational bait method is established here.
When the River Name Helps Identify the Fish
For this species, where a fish was found can tell more than a familiar color pattern. The split from Ozark Madtom demonstrates how two nearly identical fishes can represent distinct evolutionary lineages in neighboring drainages.
All Lakes With Black River Madtom
Browse lakes and reservoirs with documented Black River Madtom records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
No published lakes are currently linked to this species in our confirmed records.