Author: (Gilbert, 1905)
Remark: The species <i>Festucalex amakusensis</i> (Tomiyama ,1972) and <i>Festucalex townsendi</i> (Duncker, 1915) are considered as valid in Eschmeyer (CofF ver. Mar. 2011: Ref. 86697) following Kuiter (2009: Ref. 86771).
Comments: Benthopelagic (Ref. 58302).  Reported to have been dredged in 80.5 m (Ref. 4281).  Ovoviviparous (Ref. 205).  The male carries the eggs in a brood pouch which is found under the tail (Ref. 205).  It is exported as an aquarium species from Hawaii.