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 The
body of the batfish is very flat and compressed, so that the
adult of the species actually resembles a disk. The forward
profile of the head is convex and smooth, but it is broken
in line with the snout, which becomes progressively longer.
The young of the species have very tall and narrow dorsal
and anal fins, but over time these become shorter and rounder.
The coloration also varies with age. The young are reddish
or yellowish-brown, while the adults display broad dark vertical
bands, or else are more or less silvery, while parts of their
fins are dark in colour. They live in small schools and are
omnivorous. They grow to a length of 50 centimetres.
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The
body is oval and compressed. The snout is short and has a concave
profile. The dorsal and anal fins are rounded and the caudal
fins are slightly incised. The general coloration of the body
is dark blue. The head is black. The dorsal fin is yellow, edged
with black and light blue. The caudal fin is light blue at the
centre while the edges are black and dark blue. The base of
the pectoral fin is orange. There is a yellow spot on the caudal
peduncle which indicates the position of the sharp erectile
spine. These fish live in schools and are herbivorous. They
attain a length of twenty centimetres.