Janthina janthina, a bubble-rafting violet snail. The snail excretes mucus from its foot and uses the raft of bubbles to float from place to place. 'Very novel and very puzzling': Unknown species of ...

Not everyone is a fan of snails, but there’s no denying the benefits they bring to a freshwater aquarium. Aquatic snails are fascinating creatures that bring color to a tank and help keep it clean.