Originally Posted by joy13
Your tank is large enough for either goby and both seem to be pretty easy to care for. It sounds like you really like the engineer and once you do a little more research I am pretty sure that is the one you will end up with. They change colors as they mature.
I have both... Watch man 2 watchman I had for 4 years until on recently disappeared...the engineer was added like 6 months ago n yes they grow fast!! What I don't like too much is they both burrow into the sand.. MAking a mess ;;( but good to watch them