stone moroko or topmouth gudgeon, monkey goby and juvenile common rudd, omnivore freshwater fishes in biotope aquarium

adaptable adult animal aqua aquadesign aquarium aquatic asia asian behaviour biotic biotope clear closeup common curious cyprinid dangerous decorative destructive ecology endemic erythrophthalmus european fauna fish fishes fishkeeping fluviatilis freshwater gobiidae gobioninae goby gravel gudgeon harmful highly invasion invasive juvenile local monkey moroko nano natural nature neogobius omnivore omnivorous parva predator pseudorasbora river rudd sand scardinius search species stone swim tank threat topmouth underwater unusual water weed widespread wild wildlife