> Freshwater mussels have existed in these ecosystems for thousands of years, evolving to mimic intricate fish this is a throwaway comment in here but it descr

> Freshwater mussels have existed in these ecosystems for thousands of years, evolving to mimic intricate fish this is a throwaway comment in here but it describes a really cool adaptation of some bivalves which is that their mantle looks like a fishing lure -- it sticks out of the shell and mimics a prey species. When the predator comes to strike, the mussell injects its eggs, which mature in the predator's gills.