wild caught monkey goby fish on sand bottom, southern buh river brackish biotope aquarium, highly adaptable invasive species

neogobius fluviatilis juvenile goby gobiidae pontocaspian exotic masking temperate freshwater coldwater rare nature water clear natural aqua biotic animal aquatic harmful destructive fishkeeping underwater weed algae domesticated decorative fish tank gravel local ecology threat unusual fauna widespread aquadesign nano swim wildlife captive controlled conditions driftwood ecosystem space blur glass refraction shallow dof wild caught monkey sand bottom southern buh river brackish biotope aquarium highly adaptable invasive species cladophora led light design pondweed plant background