silver dollar fish Crewneck Sweatshirt

i mistook it for sunfish because of its similar appearance, silver dollar is an aquarium fish that is well know globally, there are many species of this fish that can kept as a pet in aquarium. the fish in this image is what i owned back when i was a kid. i learned that they need high water levels from what i remember ( i forgot ), since their appearance is too similar to the sunfish. silver dollar is native to the waters south america, the grey one are mostly kept as an aquarium pet, they also live in groups i think.