The chart below contains most of the more common freshwater fish that you will find at your local pet shop. We have divided the list into 3 categories of behavior, and defined them as follows:

• Community Fish: Unless marked with a note, these fish can be safely mixed together in the same aquarium.
• Semi-Aggressive: These fish are usually peaceful when they are small, but can become fin nippers or chase the others around the tank when they get bigger. If you really want to put one of these fish in your community tank, you can, but keep an eye on them as they get bigger.
• Aggressive Fish: Do not mix these fish with any other type fish except similar sized aggressive fish. They will bully and even eat smaller and more timid fish.

* Notes:

1. Only 1 male Siamese Fighting Fish/Betta per tank. 2 Males will fight to the death if they are in the same tank! You can have as many females in the tank as you wish.
2. Discus should not be kept with other fish other than catfish, Loaches, Neons, or Cardinal tetras. This is due to the fact that they are very susceptible to disease, they require a warmer water temperature (85 degrees F), and are sometimes slow eaters and will not fight for food.