Freshwater mussels found in Southern Ontario have a parasitic life stage called a glochidium. Here, glochidia were exposed to plastic microfibers in a toxicity test to determine whether these particles have an effect on their functional viability. To complete their life cycle, glochidia must parasitize the gills of a fish, clamping on just like Pacman would!
![Five freshwater mussels larvae](https://www.uoguelph.ca/research/system/files/3125%20B%20AFTER%20NACL%20GLOCHIDIA%202.jpg)