[Garrett]

I just recently purchased three small royal gammas from a lfs. I have acclimated them and then put them in my tank. As soon as I did that two started to fight each other and locked mouths. I'm trying to get one out. What should be my next step?

[leebca]

Your LFS probably didn't know much about the Royal Gramma (Gramma loreto). They are a feisty fish and should be kept alone. They don't get along with each other.

"What should be my next step?" Return two of them.

[Garrett]

They can be kept with other fish though correct? Just not there own species

[leebca]

Yes. They can be kept in a community tank. The choice of tank mates should be fishes that are what I call 'assertive.' This is opposed to fishes that are shy, but 'nicer' fishes then those considered aggressive.

[Garrett]

Begs me to ask the question....What is your definition of assertive?

[leebca]

An assertive fish is one that swims forward when you enter the room. Or it takes up a perch or position getting ready for food. It recognizes the feeder and waits to be fed. (The aggressive fish may do the 'recognition' part but acts almost 'rabid' to get at you and its food).

During feeding, the assertive fish does not 'steal food' from the mouths of other fishes (unless the bit of food is too large for the 'other fish' to swallow). The assertive fish doesn't push other fishes out of the way during feeding. In short, it eats its share with the community, but is more likely found where the food enters the tank, rather than a shy fish, which may circle the 'food drop zone.'

The assertive fish usually swims in the open or swims where it can be easily seen even if there is some activity outside of its aquarium.

When you put equipment or a gloved hand into the aquarium the assertive fish may come forward to investigate, then retreat. From a safe place, it may keep an eye on you and the 'action.' The aggressive fish may just as soon bite you as watch you. The shy fish would have disappeared from sight before you put anything into the aquarium.

Etc.