Barred spinefoot - Siganus doliatus
I was doubting on the species even though it was the only rabbitfish I see with vertical stripes. My doubts were mostly because during the day they are yellow but I was more reassured by this video:
https://www.shutterstock.com/fr/video/clip-2208136-barred-rabbitfish-siganus-doliatus-sleeping-underwater-fiji
and this other link:
http://www.picture-worl.org/actinopterygien-nouvelle-caledonie-8b1-siganus-doliatus-guerin-meneville-1829-385.html
So the fish is just wearing its pyjamas :-)
"Siganus doliatus" is a species of ray-finned fish in the family Siganidae. It is native to the western Pacific Ocean where it occurs on reefs and in lagoons.
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