
KOKOMO PRIVATE ISLAND, FIJI · FISHING · 9 MIN READ
The Long Run South: Fishing Kadavu’s Underwater Mountain
Past the end of the Astrolabe, a seamount rises out of 3,000 feet of water off the last island in Fiji. It is the reason to give up a whole day of a Kokomo stay.
By J.C. Mercer
Know before you go
- Base Kokomo Private Island, northeast Kadavu
- The run about 70km southwest to Nagigia, roughly the length of the island
- The ground a 6,000-foot trench, a 1,000-foot wall off the rocks, a seamount seven miles south
- Best months January to May for calm water and jigging, June to September for the wahoo run
- Charters full-day private charters are quoted per boat, not per angler
Every stay on this site is paid for in full and booked the way any other guest would book it.
Most fishing days out of Kokomo do not go far, and they do not need to. The Great Astrolabe Reef ends a short run from the dock, and the drop-off there produces enough that plenty of guests never see anything else. Wahoo patrol the edge through winter, yellowfin stack on the outer seamounts through summer, and you are back for lunch at Kokocabana.
Then there is the long day. Southwest, down the length of Kadavu, to where the island runs out and the seafloor does something worth the fuel.

I slept here
Kokomo Private Island, Fiji
- Nights 7
- Stayed April–May 2026
- Room booked One-Bedroom Beachfront Villa, sunrise side
- The fishing day 28 April 2026
- How it was booked Amex Fine Hotels + Resorts, public rate
- Rate band $$$$ — Check current rates
Why go that far
At the southwestern tip of Kadavu sits Nagigia, 26 acres of privately held rock marked on some charts as Denham Island. Surfers know it for its reef breaks. What draws anglers is underneath.
The island sits on the edge of a trench that drops to 6,000 feet. Parts of it hang directly over a 1,000-foot wall, close enough that you can fish genuine deep water standing on rock, which is a sentence that applies to almost nowhere else in Fiji. Seven miles further south, a sea mountain rises off the floor and stops 120 feet below the surface, its flanks falling away to 3,000.

That last number is the trip. Current moving across open ocean hits the mountain, gets forced vertically up its sides, and pins bait against the top. Predators learn the address. Fish that would otherwise be scattered across thousands of square miles stack into a spot a sounder can find and a boat can hold over.
The records bear it out. Fiji’s all-tackle national record for dogtooth tuna came off the Kadavu seamount, and the province holds several IGFA wahoo world records taken along outer reef edges nearby. That is not marketing copy. It is what the terrain does.
What is running, and when
| Season | Months | Water | What is on |
|---|---|---|---|
| Warmer | Oct to Apr | 26 to 30°C | Large yellowfin on the seamounts, mahi-mahi working flying fish, blue and black marlin in the deep |
| Cooler | May to Sep | 23 to 26°C | Wahoo packs and sailfish along the Astrolabe and Solo edges, mid-size yellowfin, walu and Spanish mackerel |
| Year-round | Any | Either | Dogtooth tuna and giant trevally, both territorial, both released |
Kadavu’s summer, January through May, brings the calmest water and the best conditions for casting poppers and dropping jigs down a seamount wall. This is also when the big yellowfin move through, with the largest fish around February and March.
The winter trades from June to October make the run rougher but bring the wahoo, which is what this coast is actually famous for. They gather into packs along the reef edge and the fishing turns into something closer to a fight than a wait.

The island’s shape and the barrier reef always leave a workable lee side, so there is no dead month. There are only different tactics and different odds that 70km each way will be comfortable.
How the day runs
Leave in the dark. A run of this length eats daylight and the mountain fishes best early.
Troll the whole way down, because the water between Kokomo and the southwest tip is not empty and there is no reason to run it dry. Expect the crew to work the Astrolabe edge on the way through and to stop for anything that shows on the surface.

At the mountain, the sounder does the work: find the top, find the bait stacked against it, then jig the flanks or cast into whatever is breaking. Dogtooth pull straight down into structure and will take the rig with them if the drag is set politely. Set it rudely.
The rocks at Nagigia are the other option, and the strangest fishing available in the country. You stand on land and cast into a thousand feet of water.
Tackle and protocol
Bring your own if the seamount is the point. Popper rods rated for a 50kg trevally and jigging gear that survives a dogtooth heading for the bottom are not things a small operation stocks in your preferred action. Resort tackle is adequate for trolling the reef edge and will feel thin on the mountain.

Catch and release is standard on trevally and dogtooth. Both are territorial, both are slow to repopulate, and Kadavu crews raise it before you do, which tells you something good about the crews.
Dinner
Back at Kokomo, the catch goes to the kitchen. The resort runs a dock-to-dish program, and walu, mahi-mahi, and yellowfin all survive the trip well. Radio ahead with what you are keeping.
Chef Caroline at Walker d’Plank works without a set menu and builds dinner around whatever came off the boat that day regardless, so arriving with your own fish simply makes you part of the supply chain rather than a guest being accommodated.

The counterargument
This is a long way to go for a day that can produce nothing. Seamounts concentrate fish, they do not guarantee them, and when the current runs wrong the structure goes silent and you are four hours from your villa with nothing to show.
Weather governs the whole thing. A run this long needs a settled forecast, and the trade wind months from June through August cancel more days than anyone advertises. Book it at the front of your stay so a blown-out morning is not the end of the idea.
There is also an honest case against making the trip at all. The outer Astrolabe and Solo reefs are twenty minutes from Kokomo’s dock, hold wahoo, sailfish, walu, and mid-size yellowfin depending on the month, and give you the afternoon back. Unless the mountain is specifically what you came for, the short day is the better day.
And fishing is not in the rate. Meals, non-alcoholic drinks, laundry, pressing, nanny service, kids and teens clubs, and non-motorized watersports are all included at Kokomo. Charters, diving, and excursions are not.
What it costs
Kokomo does not publish charter pricing, so ask when you book and budget against the national market. Full-day private offshore charters are quoted per boat rather than per angler; half days and inshore reef charters cost less and typically cover boat, crew, tackle, bait and ice.
A resort-operated boat on a long offshore run sits at the top of the market or above, and fuel for 140km of round trip is the reason. Split across four anglers it lands in the same range as a couple of spa treatments. Tipping the crew is customary for a full day.
Know before you go
Confirm the long run is even on the table before you arrive, since it depends on the boat, the crew, and a forecast nobody can promise you in advance. Tell them what you are targeting before you leave the dock, because rigging for marlin and rigging for a seamount are different days and the boat gets set up differently for each. Take seasickness tablets whether or not you think you need them, since the water past the reef line moves and the run is long enough to matter. Bring polarized lenses and more sunscreen than seems reasonable for a day spent mostly sitting down. And put nothing on the calendar for the afternoon you get back.
Reef fishing gives you variety. A mountain gives you size.





















