Hey guys I've got a weird one for you today. 
My buddy Kurt caught a halibut on Tuesday near Oyster Point.  It was short so he released it but it was brown on BOTH sides!  Has anyone seen this before?

We’re both eyes on one side? I thought that when the eye fails to migrate to the other side of the head, then both sides stay dark.

Spon of Satun abominashun! 

ida tuk it outta the gene pool

It just means you get fat fillets on both sides 

Spon of Satun abominashun! 

ida tuk it outta the gene pool

Interesting.. Thank you Johnny

some Fb charter posted one, of a dozen or more ,that was dark on half ,light on half, off the white side  like it was dipped tail first in dark paint the top half was bone white

Here's what Milton Love has to say in his writeup on CA halibut (from his awesome book, Probably More Than You Want to Know About the Fishes of the Pacific Coast):

An albino halibut has been reported, as well as numerous ambicolored individuals pigmented on both sides. Completely ambicolored fish always have a "hook" (a large depression) behind the eye, near the dorsal fin. What seems to have caused this color anomaly is a botched-up eye migration. As a larvae begins to settle out of the water column, one of the eyes begins to migrate from one side of the fish to the other. (In most species, it is always the same eye, either left or right, that migrates. In the California halibut, it can be either eye.) The fish then flops over on its side , eyes upward, and lives from then on as a "flatfish." Only the up (eyed) side develops pigment; the downside, which is against the sand, is white. If the eye does not migrate properly (that hook is a symptom), the fish's brain seems to get confused and does not turn off the pigment production to one side, and both sides are colored.

This one fought a lot harder than others and appear to be keeper.  So I netted it and grabbed the tail right away to prevent further splitting.    Unfortunately was 3/4" too short.  It was very confusing for a sec not finding the bottom (white) side.

Wow great research!

Here's what Milton Love has to say in his writeup on CA halibut (from his awesome book, Probably More Than You Want to Know About the Fishes of the Pacific Coast):

An albino halibut has been reported, as well as numerous ambicolored individuals pigmented on both sides. Completely ambicolored fish always have a "hook" (a large depression) behind the eye, near the dorsal fin. What seems to have caused this color anomaly is a botched-up eye migration. As a larvae begins to settle out of the water column, one of the eyes begins to migrate from one side of the fish to the other. (In most species, it is always the same eye, either left or right, that migrates. In the California halibut, it can be either eye.) The fish then flops over on its side , eyes upward, and lives from then on as a "flatfish." Only the up (eyed) side develops pigment; the downside, which is against the sand, is white. If the eye does not migrate properly (that hook is a symptom), the fish's brain seems to get confused and does not turn off the pigment production to one side, and both sides are colored.