ɐn ɐdˈɪʃənəl dˈɑːɹk spˈɑːt ɔnðə ɡˈɪl plˈeɪt ɪz nˌɑːt blˈæk, bˌʌt tɹænslˈuːsənt, ɛkspˈoʊzɪŋ ðə pˈɪŋk ʌvðə ɡˈɪlz.
An additional dark spot on the gill plate is not black, but translucent, exposing the pink of the gills.