Unique Characters: Body tan, mottled; reticulated below. A long, horizontal fold (keel) of skin along body ventrolaterally from abdomen to caudal fin and with rows of spots. Preopercular spine with three teeth. Four anal-fin rays.
Lancer Dragonet Paradiplogrammus bairdii. Body mottled. First dorsal fin high and wide. Ventrolateral dermal fold (keel) absent. Seven or more anal-fin rays. Preopercular spine with an forward-projecting ventral spine and three or more upward directed spines.
Spotfin Dragonet Foetorepus agassizii. Body orange-red with yellow markings on fins. Ocellated black spot in first dorsal fin. Ventrolateral dermal fold (keel) absent. Seven or more anal-fin rays. Antrorse ventral spine lacking and usually only two upward directed spines at posterior preopercular tip.