adult ninespine stickleback, active and curious, tiny freshwater decorative wild fish feel good

active adult algae animal aqua aquadesign aquarium aquatic beauty biotope clear closeup coldwater curious current decorative dof domesticated ecology europe european fauna feel fish fishkeeping free freshwater gasterosteidae good gravel grey habitat ichthyology inspiration instinct local macro native natural nature ninespine ornamental plant protection pungitius river sand shallow shy space spine stickleback tank temperate threat tiny ukraine underwater vegetation vulnerable water weed widespread wild