ninespine stickleback, pungitius pungitius, freshwater wild fish, domesticated in european biotope aquarium, hides and watches

adult algae animal aqua aquarium aquatic biotope ceratophyllum clear closeup conditions controlled design domesticated ecology europe european fauna fish fishkeeping free freshwater funny gasterosteidae grey habitat hides hornwort ichthyology instinct intellect its local macro native natural nature ninespine ornamental plant planted prey protection pungitius river shelter shy space spine stickleback swamp tank temperate threat ukraine underwater vegetation watches water weed widespread wild