small fish in tank

amphibian angelfish animal aquaculture aquarium aquatic argus arthropod asian background beautiful brackish branch butterfly carp colorful coral culture curve decoration eats extensive farming fish fisheries flame flower food fresh freshwater garden gold gramma grass green insect invertebrate japan japanese koi leaf marine moss natural nature ocean orange organism ornamental parrot pet plant pond red reef relaxation royal scat scatophagus sea seafood small spotted square swim swimming tank threadfin tropical two-water underwater vietnam water white wildlife yellow