Fantail Sole Identification Guide
How to recognize a fantail sole by its rounded fan-shaped tail, sharply arched lateral line, and mottled brown coloring.
Read the full Fantail Sole encyclopedia entry →Key identification features
- Small, oval-bodied, left-eyed flatfish (both eyes on the left side of the head)
- Rounded, fan-shaped caudal fin that gives the species its name
- Lateral line strongly arched over the pectoral fin
- Eyed side mottled brown, tan, and gray with fine dark speckling; blind side pale white
- Grows to about 18-22 inches, with an oval rather than elongate body profile
Common look-alikes
- California halibut: has a much larger, sharp-toothed mouth and a nearly straight lateral line, unlike the fantail sole's small mouth and sharply arched line
- Diamond turbot: shows a rhombic (diamond) body outline and a more angular tail rather than the fantail sole's rounded, fan-shaped tail
- Speckled sanddab: noticeably smaller at maturity, with a flatter, less arched lateral line
Where you'll see one
Fantail sole live on sandy and muddy bottoms of bays, estuaries, and the inner continental shelf along the eastern Pacific, ranging from central California south to the Gulf of California, typically in shallow water down to about 200 feet.
Frequently asked questions
How can I tell a fantail sole from a California halibut?
Check the mouth and tail - fantail sole has a small mouth and a rounded, fan-shaped tail, while California halibut has a much larger, toothy mouth and a straighter lateral line.
What is the easiest single feature for spotting a fantail sole?
Look for the strongly curved lateral line arching sharply over the pectoral fin, combined with a rounded, fan-shaped tail.