Fish

A big fish in a small pond - An important person in a small place or organisation.

A fish out of water - to feel awkward or uncomfortable because you are in an unusual or unfamiliar situation

Anything with scales counts as a fish. - Malay (on appearance and reality)

Plenty of fish in the sea -There are other people/things in the world; to have other alternaves/ to have lots of potential mates in the world

To have bigger/other fish to fry = to have something more important to do

To drink like a fish = to drink a lot of alcohol