How do know if a mussels are freshwater or not?

You can't tell if a mussel is freshwater or saltwater just by looking at it. Here's why and how to determine the type:

Appearance is not a reliable indicator:

* Freshwater mussels and saltwater mussels (also called "blue mussels") can look very similar, especially if you're not an expert.

* Size and shape can vary greatly within both types.

* Color can also vary based on species and environment.

Here's how to determine the type:

1. Habitat: This is the most reliable indicator.

* Freshwater mussels live in rivers, lakes, and streams.

* Saltwater mussels live in the ocean or brackish estuaries.

2. Salt tolerance:

* Freshwater mussels cannot tolerate saltwater.

* Saltwater mussels can tolerate a wide range of salinity, including freshwater for short periods.

If you are unsure:

* Don't eat wild mussels unless you are certain they are safe.

* Consult a local expert or guide.

Remember: It's always best to err on the side of caution when dealing with wild mussels, as some freshwater species can be poisonous.