three large black pacu swim behind glass in exposition aquarium complex of freshwater fauna of dnu ukraine. exotic freshwater

actinopterygii amazon america animal aquaculture aquarium background behind black blackfinned bottom brazil cachama characiformes closeup colossoma complex copy dnipro dnu exotic exposition fauna fish floating freshwater gamitana giant glass green large macropomum national natural nature orinoco pacu serrasalmidae south space swim tambaqui tank three tropical ukraine underwater university water wild zoo