Rock Sole Flavor Profile

Rock Sole Flavor Scale

Next to Yellowfin Sole, Rock Sole is the largest US flatfish fishery. There are actually two Pacific Ocean species of which are called Rock Sole, Northern Rock Sole (Lepidopsetta polyxystra) and Southern Rock Sole (Lepidopsetta bilineata).
Rock Sole have a mild, sweet flavor with small tender flakes and a medium texture. They are a little more flavorful and firm than Lemon Sole. Fillets are thin.

Typical Cooking Methods

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

Alternate Names

Rock Flounder, Broadfin, Roughback

Rock Sole Description (Lepidopsetta bilineata)

Rock Sole are actually a right-eyed Flounder and not a Sole, but are called “Sole” because the word is more marketable. They are found with a number of color variations on their upper side including grey, olive green, dark brown or black all with various shades of marbling. They may also have red or yellow spots. Although they can weigh up to 5 pounds, average commercial catch weight is about 2 lbs for a whole Rock Sole.

There is a large Japanese market for their roe so the majority of the catch is fished from January to March when the females have eggs.

Typical Wholesale Products

Dressed, Fillets in various size categories per oz, such as 2/4, 4/6, 6/10 or sometimes as 1/3, 3/5, 5/7, and 8/up.

Range & Habitat

Rock Sole are a Pacific Ocean flounder found from California to the Alaskan Bering Sea. It is also caught in the oceans from Japan to Russia. They dwell in waters as deep as 2,400 feet. Northern Rock Sole (Lepidopsetta polyxystra) are found from Puget Sound through the Bering Sea and Aleutian Islands around to the waters north of Japan. Southern Rock Sole (Lepidopsetta bilineata) are found from the southeast Bering Sea to Baja California.

Fresh Rock 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


Rock Sole Butchering Yield Percentage & Recovery

Item To Skin/On Fillets To Skin/Off Fillets Notes
Whole Round to Dressed Head/On 86% (+/- 4)
Whole Round to Dressed Head/Off 65% (+/- 10)
Whole Round to Skin/Off Fillets 27% (+/- 3)
Head/On gutted 32%
Head/Off gutted 42%
Yield % varies according to a number of factors including: size of fish, season, sex, and the skill of your fishmonger.


Nutritional Information

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

* Calories/Calories from fat 151
* Protein grams 32
* Fat grams 1.7
* Saturated fat grams 0
* Sodium milligrams 137
* Cholesterol milligrams 0
* Omega-3 grams 0


Rock Sole Sustainability Info

Name Alternate Names Catch Method Catch
Rock Sole, Lepidopsetta bilineata Sole Wild – Bottom Longline, Bottom Trawl, Midwater 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


Comments from before Site Migration

Add a Comment!

VICTOR []    [ Aug 04, 2012  ]

Hi. I was looking at your site and noticed that whenever you make reccommendations on what is the “best choice” for a species of fish, it is always US caught fish as apposed to other countries. Typical for Americans to avoid recognizing Canada as a coutry that share the same oceans and also the same border. How is Alsaka caught Halibut different than canadian caught Halibut. Both are from the same geographical region and waters and both are biologically exact.

If you are looking for reasons to list Canada as well of the US for species of fish we both share in both our waters, then you must look at the tracvk record for Canadian fisheries laws and regulations as apposed to US mainly Alsakan reputation. Alaska has a long history of doing what they want and have been known to overfish and disragagrd any attempt by Canada to regulate the fisheries and thereby manage the resources wisely. Whether it be salmon, halibut, or otherfish, Alaska is know and always have been based there quotas on greed and indifference to the warning signs displayed ny both Canadian as well as US scientists.

I personally know a few Alaskan fisherman who seem to think that the fish in the ocean will never die out and they believe that if they don’t catch the fish in the sea, someone else will and they will lose money. At the end of the day in Alaska, it is always about the money and human greed instead of conservation of the stocks for future generations as well as present. Perhaps you can use the California, Oregon, and Washington salmon histories to see what Alaska is still doing today. How are your salmon stocks in those States today? I rest my case.



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