Saltwater · Autumn peak (Sep-Nov); present year-round in estuaries

Yellowfin Goby

Acanthogobius flavimanus

Japan's national beginner's fish, fished in autumn by hand-rod probing in estuaries and inner bays — Tokyo Bay is the emblem — in 'choi-nage' and 'miyako' styles. A classic tempura fish. Honestly noted: it has been introduced to North America and Australia and is established there as an invasive species.

Seasons · Peak

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Yellowfin Goby — Photo: Totti, CC BY-SA 4.0 — Wikimedia Commons

Identifying features

Yellowish fins, especially the anal and caudal fins tinged yellow
Mottled olive-brown goby body with dark saddles
Two separate dorsal fins, the first spiny
Large, fleshy pectoral fins and fused pelvic fins forming a weak disc
Blunt head with eyes set high and a downturned mouth

Habits

Probes sandy-mud bottom for worms, small shellfish and crustaceans
Autumn is the classic season, when fish gather in estuaries
Moves with tides into shallow flats to feed
Small and delicate-biting; a quintessential beginner's target
Introduced outside Japan — established as an invasive species in parts of North America and Australia

Distribution

Regional coverage expanding

Where to find them

Tama River mouth and Tokyo Bay estuaries, Tokyo and Kanagawa
Yodo River mouth and Osaka Bay, Osaka
Ise Bay and Mikawa Bay estuaries, Aichi

Where they live

Estuaries and river mouths with sandy-mud bottomInner bays, canals and harbour cornersShallow tidal flats and slow channels

How to catch them

Hand-rod probing (choi-nage) Shore

Rig: Short hand rod or light spinning rod with a tiny hook and split shot, dragged slowly along estuary mud and canal edges

Bait/lure: Tiny shrimp or worm pieces

Key tip: Inch the bait along the bottom and strike at the slightest stop — bites are just a pause.

Float fishing in canals and harbours Shore

Rig: Small float with a tiny hook and shrimp or worm piece, set near bottom in quiet canals and harbour corners

Bait/lure: Shrimp pieces under a small float

Key tip: Watch the float, not the rod tip — many bites are only a slow sinking.

Best baits & lures

Shrimp piecesMarine worm piecesSmall crab pieces

Techniques for Yellowfin Goby →

Baseline setup

Rod: Light hand rod or short spinning rod
Line: Light mono 4-8 lb
Terminal: Tiny hooks size 10-14, split shot, small float or bottom rig

Recommended gear for this species

Rod · Best value

9' 5-weight fly rod outfit

≈ US$180-260

Covers chironomid lakes and small rivers with one setup.

Flies · Budget

Chironomid assortment (30 patterns)

≈ US$25-40

Chironomids are 60% of a lake rainbow's diet in spring.

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

Typical size

Common 4-6 in (10-15 cm), under 0.25 lb (0.1 kg); large fish to 10 in (25 cm)

On the table

Good — a classic tempura fish in Japan; small, delicate white flesh best eaten fresh and cooked simply.

Similar species

Yoshinobori Goby ComplexYoshinobori are small freshwater gobies of clear streams with orange throats in males; yellowfin goby is a larger estuary and brackish-water goby with yellow-tinged fins

Regulations vary by area and can change in-season — always check the official rules for your area before you fish. Regulations guide →

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