stone moroko or topmouth gudgeon, aggressive solitary freshwater dwarf fish from east in biotope aquarium

adaptable adult aggressive animal aqua aquadesign aquarium aquatic asia asian behaviour biotic biotope clear closeup common curious cyprinid dangerous deathly decorative destructive dwarf east ecology european fauna fish fishkeeping freshwater gobioninae gravel gudgeon harmful highly invasion invasive local moroko nano native natural nature omnivorous parva predator pseudorasbora river rivers sand search solitary species stone swim tank threat topmouth underwater unusual water weed widespread wild wildlife