An Offshore Grand Slam is defined by the International Game Fish Association as any three of the following caught in the same 24-hour period:
- Billfish species (Atlantic blue marlin, Pacific blue marlin, striped marlin, black marlin, white marlin, sailfish, swordfish, spearfish)
- Dolphinfish (mahi mahi, dorado)
- Tuna species (bluefin tuna, dogtooth tuna, albacore, yellowfin tuna, etc.)
- Wahoo
All up there have been about 70 offshore grand slams registered with the IGFA. The most recent at the time of writing was registered on Jan 24, 2023, by angler Bob Kurz, who caught a blue marlin, a dolphinfish, and a yellowfin tuna off Piñas Bay in Panama.
In terms of composition, it is probably the dolphinfish that is the most common capture in an Offshore Grand Slam, followed by the wahoo with a billfish of some sort making up the third leg.
Catches have to be logged and registered according to IGFA rules to count as an official Offshore Grand Slam.
See also: IGFA records for a heap of different podcasts
What Is an Offshore Super Grand Slam?
An Offshore Super Grand Slam is any four of the species within that group taken within the same 24-hour period and logged and registered according to the IGFA rules.
All up, there have been just 18 official Offshore Super Grand Slam’s registered with the IGFA.
The most recent was in June 2022 when Lewis, Gregg caught a Blue Marlin, Wahoo, Dolphinfish, and Blackfin Tuna off Destin, Florida.
All up, the Seychelles – an island chain in the Indian Ocean is the most productive sport for super grand slam chasing with of these slams registered there.
See also:
- What is a Bass Grand Slam?
- What is a Billfish Grand Slam?
- What is a Flats Grand Slam?
- What is a Salmon Grand Slam?
- What is an Inshore Grand Slam?
Where Is the Best Place to Try for an Offshore Grand Slam?
Central America is arguably the go-to destination to get yourself an Offshore Grand Slam.
Costa Rica, Mexico, Panama, and Guatemala are all well-represented in the list of offshore grand slams and super grand slams.
Florida is the go-to state within the US for offshore grand slams, although slams have been registered in Hawaii, Maryland, Alabama, North Carolina, and New York have also been the setting for offshore grand slams.
Billfish slams have also been recorded in Australia, the Pacific islands, and off the coast of Africa.
Has There Been an Offshore Fantasy Slam?
No, to date, no angler has caught the required five different members of these species in a single day.
Offshore Super Grand Slam Table
Here is a list, courtesy of the IGFA, of the current tally of Billfish Super Grand Slam winners
| Angler | Date | Species | Location |
|---|---|---|---|
| Costantini, Chip | 05-Jul-19 | Black Marlin, Sailfish, Dolphinfish, Yellowfin Tuna | Los Sueños, Costa Rica |
| Gottardo, Marco | 16-Aug-18 | Sailfish, Yellowfin Tuna, Wahoo, Dolphinfish | Boa Vista, Cape Verde |
| Harmon, Christopher | 19-Sep-15 | Wahoo, Sailfish, Dolphinfish, Blackfin Tuna | Islamorada, FL, USA |
| Hayes, Eugene | 19-Jun-15 | Sailfish, Wahoo, Yellowfin Tuna, Dolphinfish | Denis Island, Seychelles |
| Heyer, Grant | 27-Apr-15 | Blue Marlin, Dolphinfish, Wahoo, Dogtooth Tuna | Seychelles |
| Hiler, Sandra | 11-Oct-11 | White Marlin, Dolphinfish, Blackfin Tuna, Wahoo | Atlantic Ocean, Venezuela |
| Hussein, Osama | 25-Jan-16 | Sailfish, Wahoo, Yellowfin Tuna, Dolphinfish | Indian Ocean, Seychelles |
| Ireland, Daniel | 24-Dec-97 | Sailfish, Wahoo, Dolphinfish, Blackfin Tuna | Key West, FL, USA |
| Kenedy Wilson, Akexandra | 30-Oct-14 | Sailfish, Wahoo, Dolphinfish, Yellowfin Tuna | South Dropoff, Seychelles |
| Lewis, Gregg | 01-Jun-22 | Blue Marlin, Wahoo, Dolphinfish, Blackfin Tuna | Destin, FL, USA |
| Marest, Eric | 17-Dec-16 | Blue Marlin, Dolphinfish, Yellowfin Tuna, Wahoo | Guadeloupe |
| Mason, Michael | 09-Aug-14 | Sailfish, Wahoo, Yellowfin Tuna, Dolphinfish | Denis Island, Seychelles |
| Pearson, Ray | 15-Aug-18 | Black Marlin, Blue Marlin, Sailfish, Yellowfin Tuna | Puerto San José, Guatemala |
| Sanchez-Manrique Tavella, Ricardo | 16-Oct-14 | Wahoo, Striped Marlin, Dolphinfish, Yellowfin Tuna | Bank off Mancora, Peru |
| Selisker, Beau | 28-Dec-20 | Blue Marlin, Dolphinfish, Yellowfin Tuna, Sailfish | Quepos, Costa Rica |
Senger, Jorn | 22-Dec-15 | Sailfish, Wahoo, Yellowfin Tuna, Dolphinfish | Denis Island, Seychelles |
| Sitnikov, Sergey | 07-Feb-19 | Blue Marlin, Sailfish, Swordfish, Wahoo, Dolphinfish | Diani, Kenya |
| Weaver, Karen | 01-Sep-09 | White Marlin, Dolphinfish, Yellowfin Tuna, Wahoo | Montauk, NY, USA |
