Is this flashing?

[trasor]

Is this normal Lawnmower Blenny behavior? The video was posted again in the comments below due to the first upload not working.

 

[canadianeh]

Not working

 

[trasor]

Try again here with Chrome.

 

[jelazar]

No, that's not flashing.

Flashing is when the fish starts from a few inches above the sand bed, and suddenly swims directly at the sand. The fish does a u-turn at the last second, so that it only grazes the sand with it's side.

A fish can also flash against the side of the tank, a rock, or anything else solid.

 

[Crashjack]

My guess is that your LMB is seeing its reflection and is going after it.