common newt or smooth newt, male of vulnerable european freshwater amphibian in biotope aqua

adult amphibian animal aqua aquadesign aquarium aquatic behaviour belly biodiversity biotope biotopic breeding clear clearwater closeup common concept crest cute decoration decorative driftwood eco ecology endangered endemic european fauna fish form freshwater fun gravel grey hornwort lissotriton live local male native natural nature newt pet predator protection smooth spine tail tank temperate triturus underwater vulgaris vulnerable water weed wild