physidae snail, bladder snails, family of air breathing freshwater snails, aquatic pulmonate gastropod molluscs. aquascaping anima

acuta air algae anima animal aquarium aquascaping aquatic background basommatophora bladder breathing close eating family fish focus fresh freshwater gastropod gradient heterostropha hobby invertebrate invertebrates lymnaea lymnaeoidea macro marmorata molluscs mollusk pet photography phyla physa physella physidae pulmonata pulmonate snail snails soft stagnalis tank tropical underwater water