reef images (a fish store ) says that Engineer Gobys are agrisive is that true

[lawnmowerblen]

my Engineer Goby is really sweet and lives with my Lawnmower blennie in a fake log

 

[lawnmowerblen]

i just dont know it is hard to know i saw one guys was like 1 foot

 

[dfabrikant]

I have had once since he was like 2 inches now hes like 6-7 inches and he has never been aggressive at all towards fish, sometimes he is to the crabs, but the other fish hes more afraid then anything, he hangs out under a big rock and takes all my crushed coral from under the rock and spits it out around it, hes clearing it for himself, its fun watching