I agree...they are really fun to watch and really fast!
I recently purchased a medium (1 1/2") "red-lipped" blennie. The lfs had by itself, said it was too aggressive when they put it in with the other fish??--but it was so cute I had to get it!
It's been fine with my other blennie (yellow w/pink cheeks, don't know the real name) and
Tomato Clown.
"Red" and "Tommy" dart around at feeding time, w/Red going back to the rocks to eat what he's captured then returning for the "race." "Bennie"
just darts out of the rocks and back, he's never out too long from his territory.
Anyway, I agree they are too cute!!! Enjoy--Red really enjoys chasing the live brine shrimp...