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

neogobius fluviatilis juvenile goby gobiidae pontocaspian exotic masking temperate freshwater coldwater stone moroko pseudorasbora parva rare nature water clear natural aqua biotic animal aquatic harmful destructive fishkeeping underwater weed algae 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 rest sand bottom southern bug river brackish biotope aquarium highly adaptable domesticated invasive pet species led light design pondweed plant background