The one I’m talking about does both. Marine is way too much work for me to ever take on. The only aquatic animal we have right now is my daughter’s betta, but I have had this idea for a while now to have a tank with a marimo moss ball and a bunch of different colored freshwater shrimp. Shrimp have always been my favorite aquatic animal to have as a pet. I used to have a bunch of ghost shrimp in a tank with some fancy guppies and some platys and a few snails and the ghost shrimp were my favorite part.