Rock Sole Flavor Profile
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
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.
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)|
|Yield % varies according to a number of factors including: size of fish, season, sex, and the skill of your fishmonger.|
based upon a 6 oz (171 grams) raw edible serving.
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,|
|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.|
|= Best Choice/Recommended = Good Alternative = Avoid/Not Recommended||Updated|
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