Butter Sole
Isopsetta isolepis
Also known as: Scaly-Fin Sole
Size & Weight
Average Length
12.9"
Max Length
21.5"
Average Weight
0.8 lbs
Max Weight
3.0 lbs
Lifespan
15 years
Habitat
Depth Range
60 - 1200 ft
Water Temp
42-52°F
Sandy/muddy bottoms; moderate depth
Behavior
Spawning Season
Winter-spring
Migration: Generally deep; some seasonal movement
Diet: Worms; small crustaceans; clams
Fishing Tips
PNW Season
Year-round
Techniques: Bottom fishing; often bycatch
Best Bait: Cut bait; worms
Eating Quality
Edibility
Good
Mild; delicate
Fun Facts
Yellow-edged fins; often commercial bycatch; scales on fins
How to Identify
Smooth brown coloring; found sandy bottoms; left-eyed; buttery soft meat
Commonly Confused With
Compare Side-by-Side
Official Resources
Sources: WDFW; NOAA
Change History (Last updated Feb 02, 2026 at 10:33 AM)
| Date | Change | Old Value | New Value |
|---|---|---|---|
| Feb 02, 2026 10:33 AM | Updated Avg Length | — | 12.9 |