Geelbek
Geelbek — also called Cape salmon — is the centrepiece of South Africa's recreational ski-boat linefishery. A member of the drum and croaker family, it migrates seasonally along the entire eastern seaboard, drawing boat anglers from False Bay to KwaZulu-Natal.
The flesh is highly regarded at the table, which keeps demand high and makes responsible handling important.
Scientific Name: Atractoscion aequidens
Also known as Cape salmon, bek, East Coast salmon, African weakfish
- Body is bluish to copper above the lateral line, fading to a clean white belly — a colour scheme that separates it from the similar-looking kob at a glance.
- The definitive ID mark: vivid yellow colouring inside the mouth and on the inner surface of the gill covers — the source of the name geelbek ("yellow mouth").
- Teeth are small and roughly equal in size with no prominent canines, and the skin around the mouth is notably soft and fleshy — worth knowing when handling or setting hooks.
- Grows to around 130 cm and 25 kg; most fish encountered in the linefishery are sub-adult, with large spawning adults the exception rather than the rule.
What to know
Habitat Distribution
- Native to the southwestern Indian Ocean; in South Africa its range runs from Cape Point on the southwestern tip up to Kosi Bay near the Mozambique border.
- Adults are benthopelagic — they work the water column from near the bottom up, typically over depths of 15–200 m, favouring rocky pinnacles, ledges and sandy-mud bottom in offshore coastal waters.
- Juveniles use estuaries as nursery habitat; sub-adults concentrate on the Agulhas Bank, particularly during the austral summer months.
- The species undertakes a seasonal coastal migration: adults move north to spawn off KwaZulu-Natal, then return south to deeper water — which is why fish show up in KZN waters in winter and on the Agulhas Bank in summer.
Key Locations
- KwaZulu-Natal (Durban and surrounds) — prime winter destination when spawning adults follow the sardine run north; August through October is peak season here.
- Agulhas Bank — the main summer concentration area for sub-adult fish; accounts for the majority of the commercial and recreational linefishery catch.
- False Bay to the Eastern Cape — fish are present in winter in deeper water; the species was first described from False Bay and remains part of the year-round inshore fishery here.
- Cape Point northward along the entire east coast to Kosi Bay — the full migratory corridor, with fish accessible at different points depending on season and migration stage.
Specific Spots
- Pinnacles and rocky ledges in 50–100 m of water are the go-to structure; geelbek school just above and around these features rather than sitting hard on the bottom.
- Target the zone 1–5 m off the bottom — that's the feeding band where fish are most consistently found, especially at night.
- On sounder, look for baitfish showings over structure before dropping baits; if the bait is there, geelbek are usually close behind.
- During overcast days and at first light or dusk, fish may push shallower or become more active higher in the water column over the same structure.
Geelbek FAQ
Answers from onWater's species guide.
What are the best lures and bait for Geelbek?
Whole fresh sardine or mackerel hooked through the lips is the benchmark bait, fresh or well-iced bait consistently outperforms frozen. Glow squid teasers (3-inch, green, pink, or white) with a glow bead on the trace add a visual trigger; avoid glow-stick traces, which have a poor track record with this species.
When is the best time to fish for Geelbek?
August through October, peak season off KwaZulu-Natal and Durban as spawning adults move north with the sardine run; largest fish of the year are typically encountered during this window.
How do you catch Geelbek?
Ski-boat fishing over offshore pinnacles and ledges is the dominant method, with anglers using sounders to locate baitfish showings before anchoring up and dropping whole-fish baits to the 1–5 m off-bottom feeding zone. Night sessions and the low-light windows around dawn and dusk produce the most consistent results.
What do Geelbek eat?
Sand soldiers (a small baitfish considered their staple) and mackerel, mossbunker (menhaden-type baitfish), squid, and sardines make up the bulk of the diet, whole sardine or mackerel rigged through the lips is the standard boat bait for this reason.
Where do Geelbek live?
Native to the southwestern Indian Ocean; in South Africa its range runs from Cape Point on the southwestern tip up to Kosi Bay near the Mozambique border.
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