The fourline snakeblenny derives its name from the three distinct, but incomplete,
lines that run from its head midway down the body. The fourth line is the lateral
line which resembles the other three, but runs the complete length of their body
from the head to the caudal fin. There are two very dark spots on the dorsal fin,
which is of an almost uniform width and runs from their head to the base of their
caudal fin. The anal fin runs along the belly of the fish from midway down the
body, also ending at the base of the caudal fin. The pelvic fin is large and fan-like,
while the pectoral fins are much reduced. The fourline snakeblenny usually averages
about 20 cm in length.
This fish has been caught in a few places in North America, including Victoria
Island, Hudson Bay, Ungava Bay, and the Labrador coast. It also occurs off West
Greenland, in the Beaufort, Bering, and Okhostk seas.