stone moroko or topmouth gudgeon, common freshwater dwarf fish from east, highly adaptable and enduring species is ecology threat

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