I had a cute experience with these guys
i had one in my tank that came from Indonesia, and a few weeks ago I got a pair from Hawaii,
when it came to adding them to the tank I was concerned how the old guy would greet them, I added them at night with lights off, and to my surprise I woke up in the morning to find them swimming in a trio as if they are friends for years.
do they have facebook down there in the ocean?