As with all Crangonids, the first pereopod of Crangon alaskensis is subchelate and the carpus of the second pereopod (visible just above the chela) is simple rather than multiarticulated.
The 5th segment of the abdomen (left full segment in this photo) has no spines on the posterolateral margin (right edge of segment), and the 6th segment (middle of photo) has no longitudinal dorsal ridge. The uropods and telson are to the right.
The antennal scale of the second antennae, being held out by my finger in this photo, is more than twice as long as wide and the spine on the end (left side of scale) is longer than the flatter lamella (right side of end of scale)
