Is this normal for lawnmower blenny?

[GpixL_]

Hi, I just got my blenny today and noticed that the second half of his body is very very pale and has no color. Is this normal? Thanks.

 

[melonheadorion]

ive seen mine go a half and half color like yours pictured when they get frightened. mostly when he was new. he does still do it, but its usually after my dwarf angel or bi color blenny chased/spooked him. i attribute it to "stress" in a sense. hes fine, its a normal thing that many fish do