Locally abundant in swift clear streams of the larger islands but rare on O'ahu.  Drab with numerous dark bars or blotches, nuptial males displaying black and white stripes.  Attains 7 inches.  Endemic to Hawai'i.

http://state.hi.us/dlnr/dar/pubs/Nopili.pdf

http://www5.pbrc.hawaii.edu/ccrt/taras/site/sstimpsoni.html