ninespine stickleback, pungitius pungitius, active and curious tiny and vulnerable freshwater decorative wild fish is domesticated

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