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 ...

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 ...

A major die-off of freshwater snails in an eastern Ontario lake has stirred up attention from zoologists and environmental scientists. In mid-May, high school art teacher Katie Ohlke was paddling her ...

Every home aquarium owner knows the importance of keeping a tank clean. Contaminated water is the quickest way to spread diseases and trigger health problems. For example, algae blooms are one of the ...