Kingdom: Animalia

Phylum: Chordata

Superclass: Osteichthyes

Class: Actinopterygii

Order: Perciformes

Suborder: Labroidei

Family: Scaridae

Description

Mouth is terminal, usually with prominent lips; mouth slightly to extremely protrusive; maxilla not exposed on the cheek; teeth in jaws usually separate and caniniform, the anteriormost 1 or 2 pairs typically enlarged and often directed forward; pharyngeal jaws (located at base of throat) strong with pharyngeal teeth either sharp, conical, or broad and molariform, gill membrane partially united. The process of triturating the food is performed by the pharyngeal teeth, which likewise are united, and form plates with broad masticatory surface, not unlike the grinding surface of the molars of the elephant. Of these plates there is one pair above, opposed to and fitting into the single one which is coalesced to the lower pharyngeal bone.

Reference:

ftp://ftp.fao.org/docrep/fao/009/y4162e/y4162e39.pdf

https://www.libraryindex.com/encyclopedia/pages/cpxktqbbej/parrot-fishes-fishes-parrot.html