Fish
Tessellated Darter
Etheostoma olmstedi · also called tessellated darters
Resting motionless on a sandy stream bottom, a tessellated darter blends almost perfectly into the mottled substrate below it, its tile-like pattern of dark blotches doing exactly what the name suggests before the fish darts off in a sudden burst.
Overview
The tessellated darter, Etheostoma olmstedi, is a small, hardy darter native to streams and rivers along the Atlantic coastal plain of the eastern United States. Its tile-patterned camouflage and unusually broad tolerance for varied water conditions make it one of the most common and widely distributed darter species in its range.
Common precisely because it isn’t picky
While many darter species demand very specific water conditions to thrive, the tessellated darter’s genuine flexibility has let it spread across a considerably wider range of stream and river habitat than most of its choosier relatives.
Status
Least Concern — widespread and abundant across suitable stream and river habitat throughout the Atlantic coastal plain.
Tessellated Darter: common questions
Why is it called the tessellated darter?
A tessellated darter displays a mottled pattern of small, squarish dark blotches along its body that resembles a tiled or tessellated surface, a visually distinctive pattern that gave the species its descriptive common name.
Why is the tessellated darter found in so many different habitats?
A tessellated darter tolerates a broader range of water conditions than many other darter species, including slower current and slightly brackish water near river mouths, a hardiness that has made it one of the most common and widespread darter species along the Atlantic coastal plain.
Does the tessellated darter guard its eggs?
Yes, a male tessellated darter guards eggs attached to the underside of a rock or other submerged surface until they hatch, defending the clutch from potential egg predators, a parental care pattern shared broadly among darter species generally.
Where does the tessellated darter live?
The tessellated darter is native to streams, rivers, and slow-moving water across the Atlantic coastal plain of the eastern United States, tolerating a wider range of habitat conditions than several of its more sensitive darter relatives.