It is characterized by the combination of a large, elongated blotch at the caudal-fin base
(blotch is formed by the fusion of the large caudal spot at the fleshy end of the caudal base and the last vertical bar on the
flank) that extends about 1/3 of the distance from the caudal-fin origin beyond the last scale on the caudal base to the margin
of the caudal fork; an anal-fin origin opposing the 2nd–4th branched dorsal-fin rays; eight scale rows above the lateral
line; dark pigment on the dorsal fin concentrated mainly along the margins of the rays; 36 or more precaudal lateral-line
scales; and small dentary tubercles.