ɪn fˈɪʃ, ɐ sˈʌkɚməθ ɪz ɐ vˈɛntɹəliˈoːɹiəntᵻd ɪnfˈɪɹiɚ mˈaʊθ ɐdˈæptᵻd fɔːɹ ɡɹˈeɪzɪŋ ˌɔn ˈælɡiː ænd smˈɔːl ˈɔːɹɡənˌɪzəmz ðæt ɡɹˈoʊ ˌɔn səbmˈɜːdʒd ˈɑːbdʒɛkts.
In fish, a suckermouth is a ventrally-oriented (inferior) mouth adapted for grazing on algae and small organisms that grow on submerged objects.