Rex Sole Flavor Profile

Rex Sole Flavor Scale

Like other Flounder, Rex Sole have mild, sweet flesh with small, firm flakes and flesh which is white when raw as well as when cooked. They are considered one of the better Pacific Flounders.

Alternate Names

Witch Sole, Threadfin Sole

Typical Cooking Methods

  • Bake
  • Broil
  • Deep-Fry
  • Grill
  • Poach
  • Saute
  • Smoke
  • Steam
  • Sushi

Rex Sole Description (Glyptocephalus zachirus, Errex zachirus)

Rex Sole are actually a right-eyed Flounder, not a Sole, but are called “Sole” because the term is more marketable. They have a uniform light brown to grey colored skin on their upper side and are off-white on the belly. Rex sole grow to about 2 feet long with a maximum weight of 4 1/2 lbs, but most are caught at a weight of about 2 pounds.

Rex Sole Availability

Fresh seafood availability chart: green areas show peak availability, light green show limited availability, gray indicates not available fresh.

Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec


Rex Sole Butchering Yield Percentage & Recovery

Item To Skin/On Fillets To Skin/Off Fillets Notes
Whole Round to Dressed Head/On 85% (+/- 5)
Whole Round to Dressed Head/Off 65% (+/- 10)
Whole Round to Skin/Off Fillets 32% (+/- 5)
Head/On gutted 39%
Head/Off gutted 51%
Yield % varies according to a number of factors including: size of fish, season, sex, and the skill of your fishmonger.


Range & Habitat

Rex Sole RangeAquaMaps Data sources: GBIF

Rex sole are found in the eastern Pacific, from the Bering Sea to Baja California in Mexico, and in the western Pacific from the Sea of Japan to the Russian coast. They dwell at depths up to 3000 feet deep.

Typical Wholesale Products

Whole, Dressed, H&G, Fillets (2 – 4 oz avg)


Nutritional Information

based upon a 6 oz (171 grams) raw edible serving.

* Calories/Calories from fat 156
* Protein grams 32.3
* Fat grams 2.04
* Saturated fat grams .485
* Sodium milligrams 56
* Cholesterol milligrams 82
* Omega-3 grams .3


Sustainability Info

Name Alternate Names Catch Method Catch
Rex Sole, Errex zachirus, Glyptocephalus zachirus Flounder
Wild – Bottom Longline, Bottom Trawl US West Coast, Alaska,
British Columbia
Yellow-icon_20.png Red-Dot_20.png Yellow-icon_20.png Low
Disclaimer: The sustainability info above is accurate to the best of our knowledge. However, each program randomly updates their information without our knowledge. We therefore recommend that you verify the current accuracy of this information.
Green-icon_20.png = Best Choice/Recommended     Yellow-icon_20.png = Good Alternative     Red-Dot_20.png = Avoid/Not Recommended Updated
August 2013


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Charles White

Where can I buy Rex sole , please


Asian stores tend to have them

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