The last time you visited a Petco or Petsmart store on the SouthCoast, there is a possibility that you may have unknowingly brought home a damaging sea creature. I know, it sounds incredibly creepy, but amazingly, it's true.
According to PetSmart, customers that bought Marimo Moss Balls in the aquarium section of the pet stores are being asked to be careful with them, as they may contain very destructive sea creatures. They are called zebra mussels. Never heard of them? You're not alone.
Zebra mussels almost sound like something magical out of a Harry Potter book, but they are a type of marine life that is not helpful to the ecosystem. They grow quickly and they breed quickly. These are things you do not want in your aquarium.