Common Sole Identification Guide
Recognize the common sole by its small curved underside mouth, dark pectoral fin blotch, and rough brown-grey skin.
Read the full Common Sole encyclopedia entry →
Key identification features
- Elongated oval body with both eyes close together on the right side near the top of the head
- Small, distinctly curved mouth tucked beneath a rounded snout
- Grey-brown to sandy mottled coloring with darker blotches scattered across the back
- Small dark blotch near the base of the pectoral fin on the eyed side, a useful diagnostic mark
- Fine scales giving the skin a slightly rough, gritty feel
- Continuous dorsal and anal fins wrapping around a rounded tail; usually 25-40 cm
Common look-alikes
- Sand sole – also shows a spotted pectoral fin but has a more elongated body and different fin ray counts.
- Solenette – a much smaller relative, rarely exceeding 12-15 cm, with a stubbier outline.
- European plaice – has a larger mouth positioned on top of the head and bright orange spots absent in sole.
Where you'll see one
Common sole live on soft sandy and muddy seabeds along the coasts of the Eastern Atlantic, Mediterranean, and Black Sea, from shallow shoreline shallows to around 200 m. They stay buried in sediment by day and become active foragers after dark.
Frequently asked questions
How do I confirm a flatfish is a common sole rather than a sand sole?
Both have a spotted pectoral fin, but common sole has a more compact oval body, while sand sole is noticeably more elongated with a different fin ray count.
What single mark helps confirm a common sole identification?
Look for the small dark blotch near the base of the pectoral fin on the eyed side, a distinctive marking that most similar small flatfish lack.