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.

When you think about skin care, snail mucin probably isn’t the first product that comes to mind. But snail secretion filtrate—a mucus these teeny mollusks produce to move, stay hydrated, and fend off ...