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.

Did you have an aquarium when you were growing up – or do you have one now? Did you have snails in it? In nature, our rivers, creeks and lakes are filled with freshwater snails … or were until ...

Leeches might seem like relics of a bygone age of medicine, but they haven’t outlived their usefulness to people yet. The freshwater leech Helobdella austinensis can eat its weight in snails every day ...

Neritina canalis with its eggs. Each egg contains a few hundred larvae that will be washed down into the ocean. Photo from Eric Krandall Many animals do not spend their lives entirely in saltwater or ...

While most organisms have biological clocks synchronized with the day-night cycle (circadian rhythms), marine animals in tidal areas have also developed circatidal rhythms to align with the tidal ...