Unique features of sculpins include small spines along the outer margin of
the gill covers, extremely large pectoral fins, and eyes located on the upper side of the head.
The
mottled sculpin has a widespread, but discontinuous, distribution throughout eastern and western
North America.
Colorado populations of mottled sculpin are native to the Colorado River
drainage, preferring cool, clear, and swift mountain streams and rivers.
Inter-basin water transfer
have resulted in this fish moving beyond it's native range.
It is a bottom-dwelling species, often
found under or between rocks.
Maximum Length: 6-7" (15-18 cm).