Every saltwater fish species has their own minimum tank size requirements and compatibility/incompatibility profile when added to a tank with certain other species. That's why I created the Saltwater Aquarium Blog Interactive Saltwater Fish Compatibility Chart and Tool.
Just getting started on your first marine aquarium? Finding the right fish for your tank and combining them in a way that avoids territorial quarrels can be a challenge. There are so many different species out there. Which do you choose?!