red-mouthed
/ˌrɛdˈmaʊðd/ /ˌrɛdˈmaʊθt/adjective
1In the names of animals (especially fish): having red coloration around the mouth.
2More generally: that has or is characterized by a red mouth.
Origin
Mid 18th century; earliest use found in John Hill (bap. 1714, d. 1775), physician and actor. From red + mouthed.