Cosmoledo Atoll


There are two components to the fishing at Cosmoledo Atoll and they are both exceptional. This is probably the only place in the world where guests can enjoy such superb flats fishing and extraordinary blue water fishing all in the same day. As much as we’ve traveled over the years to fish, we know of no other location that offers a better saltwater fishing experience than Cosmoledo. The bonefishing on these flats is the finest we’ve ever experienced and time and time again we hear veteran anglers remark that this location offers the best bonefishing they’ve ever had. The bonefishing at Cosmoledo takes place on a vast network of hard packed white sand flats that stretch as far as the eye can see.

The average size of the fish is about 6 pounds and on our last trip to the atoll in April of 2008, every single guest who accompanied us for the week landed at least one bonefish of 10 pounds! There are a very good number of golden permit on these flats as well large numbers of milkfish. Big Giant Trevally cruise the edges of the flats and most of our guests will wade with two rods, one rigged for bones and a larger rod rigged for GT’s. The flats fishing is all wading and guests will be taken via zodiacs from the ship to the flats where you will be dropped off and picked up. The blue water fishing that we do here is almost beyond description. We have spent many trips fishing and searching these waters for the most productive areas of the atoll. We have also devised some excellent teasing techniques during our many trips that produce sailfish, 60-100 pound GT’s, wahoo, huge grouper and snappers as well as tuna and all manner of ocean jacks.

We fish the blue water from the zodiacs and there are usually two sessions per day where we are fishing for these larger pelagics. The first half of the week is spent anchored on the northwest outer edge of the atoll. This allows guests to access the whole western half of the atoll which includes a massive flats network for bonefish, permit and milkfish as well as the best blue water area around the atoll for both GT’s and wahoo on the fly. Half way through the week, the ship will move inside the atoll which allows guests to fish the eastern half of Cosmoledo. This includes the renowned Ray Charles Flat as well as the highly productive inner passage into the atoll.


The boats used to get out to the flats as well as fish the blue water are 23 foot zodiacs powered by 85 horse powered engines. These zodiacs are the ideal watercraft to fish challenging conditions found at the Cosmoledo Atoll. Both fly fishing and spin casing are welcome.


We’ve been doing this trip to Cosmoledo for the past 12 years and over that time, Slipstream Angling has this trip pretty dialed in. Given the complexity associated with this trip, due to its remote location, we absolutely have to have it dialed in! We highly recommend coming early and staying at one of the great hotels in Mahe. The charter flight from Mahe to Astove leaves at 8 am on Thursday morning and returns to Mahe the following Thursday in the late afternoon. The charter flight flies 3 hours south to Astove and from there it’s just a 90 minute boat ride out to Cosmoledo.

This is, in all likelihood, the most remote fishing trip on the planet!

Slipstream is a full service travel company that can handle a variety of services relating to your trip. For assistance, please contact us directly at 1 866 644-7703.


$19,145 USD DBL

$24,185 USD Single room with shared skiff/guide

$3,900 USD Single skiff supplement per week (2 max available per week)

ISLAND CONSERVATION DONATION   A donation of US$210 per adult (US$30 per night) is excluded from the rates and will be added to your final invoice.

  • SEY - Seychelles
  • Mid October through April
  • Bonefish, Giant Trevally, Milkfish…
  • 8 rods guests
  • Wifi: Yes
  • Language: English
  • Physicality: Low
  • CC Payment at Facility : Yes

Cosmoledo Atoll

Tour Location


Cosmoledo Atoll is located in the Seychelles chain of islands in the Indian Ocean, 9 degrees south of the Equator and 800 km (500 miles) south west of Mahe, the capital of the Seychelles.


Bonefish and Giant Trevally. Milkfish, Indo Pacific permit, triggerfish, barracuda, wahoo, grouper, sailfish.


Mid-October through April


The fishing week at Cosmoledo runs from Thursday to Thursday. We recommend, when possible, coming in a day or two early to Mahe. This helps guests get over the jet lag associated with a long flight and doing so ensures that there are no issues with missing the Thursday charter flight down to Astove because of possible flight delays with the International flights into Mahe.


The 8 recrafted Eco Pods draw in a sense of serenity and adventure from the unspoiled beauty of its surroundings, whilst at the same time exuding a unity with its location. The Cosmoledo Eco Camp has an exceptional dining and entertainment area, consisting of a large tent with bare beach floors which features a fully stocked bar. Breakfast, lunch and dinner are included in your package. Breakfast consists of full house buffet, whilst lunch can either be enjoyed in the dining area or as a packed picnic option to be enjoyed anywhere on the island. Dinner is a time for nature enthusiasts, divers, anglers, single travelers and couples alike to come together and share stories about their day’s adventures. There is a strong emphasis on the Seychellois Creole heritage of the island and menus often feature fresh fish, complemented by produce from the vegetable garden on Alphonse Island.

Complimentary activities include guided kayaking around the atolls, guided stand up paddle boarding, a guided tour across Wizard Island for guests to familiarize themselves with the coastal trails and most secret spots on the island and the reef flats expedition where one travels the inside reef flats of Cosmoledo with a knowledgeable guide.Each week guests are offered a few luxury experiences to choose from such as sundowners on the beach, a flats lunch and on Wednesdays, de-tackling drinks and snacks. Very little SCUBA diving has been done around Cosmoledo to date, making for a thrilling and unique diving experience, with new dive sites constantly being discovered. Cosmoledo is an important bird area and holds Seychelles’ largest colonies of all three species of booby that breed in Seychelles, including the last viable population of brown booby. Enjoy a bird watching excursions with an expert guide. Of course, the bluewater and fly fishing is world-class, and guests have access to some of the top fly fishing guides in the world.


Angling capacity on board is 8 rods.

Cosmoledo Atoll

Value for money

Cosmoledo Atoll


  • Round trip Friday to Friday charter flight from Mahe to Assumption
  • 7 nights accommodation, DBL occupancy
  • 6 days of fishing, DBL occupancy
  • All meals
  • Wine with Dinner
  • Fishing License and Landing Fees
  • Water, soft drinks, coffee and tea
  • Fly fishing rod and reel rental


  • Return airfare from guest’s point of origin to Mahe, Seychelles
  • Nights in Mahe
  • Ground transfers on Mahe
  • Conservation Donation of $175 USD
  • Laundry
  • Additional meals and activities chosen in Mahe and surrounding islands
  • Gratuities
  • $40 US Airport Departure Tax
  • Mandatory Medevac Insurance
  • Tackle and flies
  • Alcohol


  • Bar tabs cannot be paid with credit cards. USD or Euros only
  • Wine and beer are available for purchase on board. Guests are invited to bring along their favorite spirits from the duty free as hard liquor is not sold.
  • Additional rods are essential on this trip along with spare lines. We’ve had as many as 12 rods break in one week because of the size and strength of the fish.
  • Due to strict weight restrictions on the domestic flight, guests are allowed no more than 50 pounds of luggage on this trip.
  • Fortunately, there is daily laundry service is available on board so bringing a lot of clothing is not necessary
  • Sailfish are only found during our fall trips where it’s common to raise 10-20 per day. Sailfish are not present during the spring season


All visitors are required to have a valid passport that expires no less than 6 months out from the time you depart the Seychelles. Additionally, all guests are required to obtain emergency Medevac Insurance, prior to their trip. This is a mandatory pre condition for all Seychelles destinations.