ɪn mˈeɪlz, ðɛɹ ɪz ɐ kənspˈɪkjuːəs dˈɑːɹk spˈɑːt ɔnðɪ æntˈiəɹɪɚ dˈoːɹsəl fˈɪn ænd ɪn bˈoʊθ sˈɛksᵻz ðɛɹ ɪz ɐ blˈæk pˈætʃ ɔnðə kˈɔːdəl pˈɛdʌŋkəl.
In males, there is a conspicuous dark spot on the anterior dorsal fin and in both sexes there is a black patch on the caudal peduncle.