The engineer goby is kinda cool.
he dug himself a hole in the front of the tank and just chills out all day. he is very mellow, he let the barnacle blenny that half his side win the battle over the rock. Oh and they grow really fast and can become a foot long from what I've read.
Since we are on this topic what do you think I should do with the engineer goby that I have in my 20g right now. He is several inches long sop he cant stay on there. Should I move him to the 90g or the 125g do you think? OR will he be ok in the new 60g?