frog larvae or tadpole frogs in the water of the river kupica, donje tihovo - gorski kotar county, croatia / Žablji punoglavci

amphibian amphibians animal aquatic background biology closeup colorful county croatia cute cycle development donje ecology education egg environment evolution fauna frog froglet frogs frogspawn gorski graphic green grow growth hrvatska ili kotar kupica kupice lake larvae life living ličinke macro metamorphosis nature outdoor outdoors pond process punoglavci reproduce rijeke river science survival swamp swim swimming tadpole tadpoles tail tihovo toad transformation tropical underwater vodi water wild wildlife young zoology Žablje Žablji žaba