Usually, snout is acutely pointed. Pectoral fins are considerably shorter than head, relatively narrow-tipped in young and acutely pointed in adults. 24–26 teeth are present on upper jaw and 24–29 on lower jaw. Cusps of upper and lower anterior teeth flexed with tips reversed. Dorso-lateral coloration brilliant blue or purplish in life, white below underside of snout and mouth in adults.