Two blennies

In a larger tank I'd say no worries.
I have a Starry and a Tailspot together with no problems. I had a Midas in with them, but disappeared. They all got along fine though.
 
I have lawnmowers, tail spot, midas, and have kept lots more together with minimal issues. Lawnmowers and starry seem to be the ones that start the most issues.

Dave B
 
I've kept two blennies who had different behaviors, lawnmower and forktail. they were fine
it really depends on the tank and the individual fish though
 
it might be ok.
one appears to be more of a "rooster" and the other seems to be more of a "swimmer"

but again, i think a lot depends on the individual fish
 
I would not risk it in a smallish tank. In a large tank, territorial imperative becomes irrelevant.
 
I've had midas and starry in my 125g no problems at all. They even ate at the nori clip side by side. But for some reason my kole tang liked chasing starry away from the clip. All fish have different personalities you never know what you'll get.
 
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