Mouthbrooding
Carrying eggs and young in the mouth to protect them, as many cichlids, arowanas and cardinalfish do.
Also: mouthbrooder
A mouthbrooding fish takes its fertilised eggs into its mouth and keeps them there until they hatch, and often lets the young fry shelter there when danger comes. The parent eats little or nothing during that time. Many cichlids of Lake Malawi and Lake Tanganyika and many tilapias brood in the female's mouth, while in arowanas, sea catfish and cardinalfish it is the male. The Banggai cardinalfish of Indonesia has young that skip a larval stage, so a population cannot spread far, which makes it vulnerable to collection for aquariums.