The in between fresh water and salt water is called brackish water... I remember that from when I worked at a pet store in the fish/reptile section, we had one tank of brackish fish like puffer fish, and some other weird types of fish! We also had mostly fresh water fish, but we also had salt water aquariums with fish and anenomiese. I really enjoyed that job!
Thanks for this. Some of the birds tolerate both environments, mallards and herons.
Oyster catchers don’t. These birds live on the sides of the tidal river bank, breaking open the shells of molluscs. Hence third long beaks like hammers.
