Engineer goby/convict blenny

[rufus2008]

I have two of these fish, 12 inches approx. long, that I've had for 2 years. I love these fish. A fellow reefer has two 5 inch ones for sale in my area. Would my original 2 "play nice" if I purchased the other two? My system is a 108 gallon mixed reef.

 

[eatbreakfast]

I would advise against adding the other engineers. While social as juveniles, as adults they are less tolerant of each other.

 

[rufus2008]

Good to know thank you. That's why I asked I don't want to start ww3 in my tank. I'll let the seller know that I'll pass on it.