Blackbar Soldierfisch not red but GREY? See Picture

Images: 
17-08-'09_Oil Slick Leap (88)_Blackbar Soldierfish.JPG

Did anyone ever saw a 'Blackbar Soldierfish' whit the colour grey?
I saw one on my vacation in Bonaire, it was next to a red coloured soldierfish.

On my websearch I found nothing about the grey colouring.

Is there anyone who can tell or know where is more information on that grey soldierfish?

Thank already for any help.

Very Washed Out

I've seen them VERY washed out. I guess a few could be described as gray in the right lighting conditions.

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