Saltwater · Spring and autumn migration peaks in the Bohai, Yellow and East China seas

Japanese Spanish Mackerel

Scomberomorus niphonius

This is the true 'bayu' of northern China — the Japanese Spanish mackerel that floods Bohai and Yellow Sea markets each spring, a blue-spotted speedster made for metal jigs and fast trolling. In Japan it is a prized winter-to-spring fish of the Seto Inland Sea and the Kii Channel, taken by casting and jigging from dedicated boats.

Seasons · Peak

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Japanese Spanish Mackerel — Photo: re_nebel, CC BY 4.0 — Wikimedia Commons

Identifying features

Streamlined seerfish body, steel-blue above and silvery below
About seven rows of small round dark-blue spots along the upper body and flanks
A broken dark lateral stripe of spots running along the mid-flank on many fish
Pointed snout, large mouth and flat triangular cutting teeth
Finlets behind the second dorsal and anal fins; deeply forked tail

Habits

Migrates north into the Bohai and Yellow seas in spring and back south in autumn
Hunts anchovies, sardines and other small schooling fish near the surface
Often travels in loose schools that slash through bait balls
The classic dumpling and market fish of Shandong, Liaoning and Hebei
Strong, fast first run — a prized light-tackle gamefish in northern China

Distribution

Regional coverage expanding

Where to find them

Tide lines and current seams off headlands
Around surface bait schools in open bays
Rocky shore points swept by tidal flow

Where they live

Coastal current seamsOpen bays and headlandsOffshore bait schools

How to catch them

Shore jigging with metal jigs Shore

Rig: Long shore-casting rod, 20-40 g metal jig ripped fast from rocks and breakwaters

Bait/lure: Metal jigs, casting minnows

Key tip: Retrieve fast with sharp jerks; use a short wire trace against the teeth.

Boat trolling Boat

Rig: Trolling rod, spoons and minnow plugs worked along tide lines at moderate speed

Bait/lure: Trolling spoons, feather rigs, diving minnows

Key tip: Follow working birds and surface bait — the school is usually just below.

Best baits & lures

Metal casting jigsLive anchovies and small fishTrolling spoons and minnow plugs

Techniques for Japanese Spanish Mackerel →

Baseline setup

Rod: Medium shore-casting or trolling rod
Line: 20-30 lb braid
Terminal: Metal jigs, trolling spoons, wire traces

Recommended gear for this species

Rod · Best value

9' medium-heavy surf spinning rod

≈ US$110-170

Casts plugs and bait past the breakers and handles stripers, drum and bluefish in the wash.

Reel · Best value

5000 size sealed spinning reel

≈ US$120-180

Salt spray and dunkings kill cheap reels — a sealed body and 30 lb braid capacity are the surf standard.

Terminal · Budget

Topwater plugs, soft-plastic jigs and fish-finder rigs

≈ US$25-40

Plugs for blitzes, jigs for the trough, bait on a fish-finder rig when they won't chase — the inshore trio.

Picks come from our rule library — never paid placements. Prices are guides; affiliate links may earn us a commission.

Typical size

Common 24-39 in and 3-9 lb; large fish over 39 in and 15 lb

On the table

Excellent — the famous bayu of northern Chinese dumplings; firm, rich flesh, also grilled and braised.

Similar species

Chinese MackerelChinese mackerel is a larger, more southern seerfish with big bronze blotches rather than neat rows of small blue spots; the Japanese Spanish mackerel is the northern 'bayu' of the Bohai and Yellow seas

Narrow-barred Spanish MackerelNarrow-barred Spanish mackerel carries many thin vertical dark bars on its flanks; Japanese Spanish mackerel carries round blue spots, never bars

Regulations 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 Japanese Spanish Mackerel

Build today's plan