Saltwater · Year-round; best in cooler months on Gulf sand bottoms
Dusky Flounder
Syacium papillosum
A small left-eyed flounder of Caribbean and Gulf sand bottoms that buries itself to ambush small fish and invertebrates, taken incidentally and deliberately on small bottom baits and jigs.
Seasons · Peak
Identifying features
- Both eyes on the left side of the head
- Mottled brown ocular side, usually with little bold spotting
- Males: first pectoral-fin rays drawn out into filaments
- Body depth about 40-47% of standard length
- Blind side pale; large males may be dusky below
Habits
- Buries in sand to ambush prey passing overhead
- Feeds on small fish and invertebrates
- Shows clear differences between males and females in fin length and pigment
- Most common in 10-90 m over sand and mud
Distribution
Where to find them
- Sand patches beside reef and rock
- Channel edges where current sweeps bait over sand
- Open sand bottom in 15-40 m off beaches
Where they live
How to catch them
Slow-drag jigging over sand Boat
Rig: 1/4-1/2 oz jig head with a small paddletail or shrimp, 10-15 lb braid
Bait/lure: Soft plastic tipped with shrimp
Key tip: Drag, do not hop, the jig across sand patches; pause after the thump — flounder grab crosswise, then turn the bait.
Bottom bait fishing on sand Boat
Rig: Two-hook dropper rig with size 2-4 hooks and enough lead to hold sand bottom
Bait/lure: Shrimp pieces or squid strips
Key tip: Drift slowly over open sand in 15-40 m and keep baits within a foot of the bottom.
Best baits & lures
Baseline setup
- Rod: 7 ft medium-light spinning rod
- Line: 10-15 lb braid, 20 lb fluorocarbon leader
- Terminal: 1/4-1/2 oz jig heads, size 2-4 hooks, bank sinkers
Recommended gear for this species
Rod · Best value
7'6" medium-heavy jigging rod
≈ US$110-170
Works 2-6 oz jigs over rock and reef and still has the backbone to lift a halibut off the bottom.
Line · Budget
50 lb braid with 40 lb leader (200 yd)
≈ US$25-40
Thin braid cuts the current so jigs stay vertical; the leader shrugs off rock and teeth.
Terminal · Budget
Leadhead jigs, swimbaits and two-hook bottom rigs
≈ US$25-40
A leadhead with a swimbait tail is the universal bottom-fish catcher, from rockfish to cod to flounder.
Picks are never paid placements. Prices are guides; price links are coming soon and none is an affiliate link yet.
Typical size
Common about 20 cm; maximum 30 cm TL
On the table
Marketed fresh locally; small but fine eating like other small flounders.
Similar species
Fantail SoleFantail sole is an eastern Pacific fish with a broad fan-shaped tail; dusky flounder is Atlantic/Caribbean with a narrower tail and filamentous male pectoral rays
HogchokerHogchoker is a tiny round sole of muddy estuaries, usually under 15 cm; dusky flounder is a larger, more elongate sand-bottom flounderRegulations vary by area and can change in-season — always check the official rules for your area before you fish. Regulations guide →
Plan a trip for Dusky Flounder
Build today's plan⚠ Heads-up: Dusky Flounder doesn't occur around Vancouver, BC (or is very rare there), so it's not a sensible local target. Your plan stays in Vancouver, BC and is built around the fish that actually live there.