Researchers find two new freshwater pearl mussel rivers in one day #freshwaterpearlmussel #Inari #natureconservation

Did you know that #FreshwaterPearlMussel shell colour varies between populations & over time? 🖤🤎🧡💛🧡🤎🖤
Younger mussels typically have lighter, more golden-brown shells that darken as they mature with some adult mussels appearing close to black. Environmental conditions can also influence this colour.