What is the meaning of Moonfish?

Any of various flat, oval marine fish of numerous species in several families:

1. in family Monodactylidae (fingerfishes, silver angelfishes).
2. Mene maculata, of tropical coastal waters of the Indo-Pacific area.
3. Most species of the genus Selene.
4. Atlantic spadefish (Chaetodipterus faber).
5. in family Molidae (ocean sunfish).
6. opahs in the family Lamprididae.
7. cusk (Brosme brosme), a North Atlantic cod-like fish in the ling family Lotidae, the only species in its genus.
8. southern platyfish (Xiphophorus maculatus).

in family Monodactylidae (fingerfishes, silver angelfishes).

Mene maculata, of tropical coastal waters of the Indo-Pacific area.

Most species of the genus Selene.

Atlantic spadefish (Chaetodipterus faber).

in family Molidae (ocean sunfish).

opahs in the family Lamprididae.

cusk (Brosme brosme), a North Atlantic cod-like fish in the ling family Lotidae, the only species in its genus.

southern platyfish (Xiphophorus maculatus).

Source: wiktionary.org