ID this fish please. Looks like some sort of a silver dollar?

  • We are currently upgrading MFK. thanks! -neo
Yep,sure is and that archer fish is brackish as well.That looks like a public aquarium display.
 
Mono argentis. Will need brackish and then full salt as it gets older. One of the reasons why I want a brackish tank. It is also a good bit more aggressive than a SD.
 
MonsterFishKeepers.com