Saltwater · Mendocino
Flatfish - Butter Sole
Ocean regulations can change in-season. Confirm with the 2026 Ocean Sport Fishing Guide and CDFW before you fish.
Species group
FLATFISH
Season
Open all year
Depth limit
None
Daily bag limit
10 fish of each species, limit 20 fish in combination
Minimum size
None
Gear restrictions
May be taken only on hook-and-line or by hand. Any number of hooks and lines
Identification
This sole is right-eyed with an oval body shape. The eyed side is rough-scaled and light to dark brown, or grayish brown with yellow or green mottling. The scales extend onto the fin rays. The blind side is white. The upper eye is not visible from the blind side. The dorsal and anal fin edges are typically bright yellow. The caudal fin is rounded to a broad V shape. The lateral line has a low arch over the pectoral fin and a long accessory dorsal branch that extends past the gill cover. Butter sole have a small mouth with blunt teeth; the strongest teeth are on the blind side. The maxillary extends just below the anterior part of the upper eye. Between the eyes is a flat narrow space and the eyes are small. This species has a strong anal spine. Butter sole are easily confused with rock sole, which have a higher arch in the lateral line and a shorter accessory dorsal branch. Butter sole can grow up to 22 inches in length, with an average length of about 8 inches. Maximum age is up to 11 years old.