monkey goby, wild caught freshwater fish rest on sand bottom in southern bug river biotope aquarium, highly adaptable

adaptable animal aqua aquadesign aquarium aquatic background biotic biotope blur blurred bottom brackish bug captive caught cladophora clear coexistence coldwater conditions controlled deathly decorative design destructive domesticated driftwood ecology ecosystem endemic exotic fauna fish fishkeeping fluviatilis free freshwater gobiidae goby gravel harmful highly interaction invasive juvenile led light local low masking monkey nano natural nature neogobius pet pontocaspian rare rest river sand southern space species swim tank temperate threat underwater unusual water weed widespread wild wildlife