What Is an Offshore Grand Slam? Full Details Explained

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: All up there have been about …

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:

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

AnglerDateSpeciesLocation
Costantini, Chip05-Jul-19Black Marlin, Sailfish, Dolphinfish, Yellowfin TunaLos Sueños, Costa Rica
Gottardo, Marco16-Aug-18Sailfish, Yellowfin Tuna, Wahoo, Dolphinfish
Boa Vista, Cape Verde
Harmon, Christopher19-Sep-15Wahoo, Sailfish, Dolphinfish, Blackfin TunaIslamorada, FL, USA
Hayes, Eugene
19-Jun-15
Sailfish, Wahoo, Yellowfin Tuna, DolphinfishDenis Island, Seychelles
Heyer, Grant27-Apr-15Blue Marlin, Dolphinfish, Wahoo, Dogtooth TunaSeychelles
Hiler, Sandra11-Oct-11White Marlin, Dolphinfish, Blackfin Tuna, WahooAtlantic Ocean, Venezuela
Hussein, Osama25-Jan-16Sailfish, Wahoo, Yellowfin Tuna, DolphinfishIndian Ocean, Seychelles
Ireland, Daniel24-Dec-97Sailfish, Wahoo, Dolphinfish, Blackfin TunaKey West, FL, USA
Kenedy Wilson, Akexandra30-Oct-14Sailfish, Wahoo, Dolphinfish, Yellowfin TunaSouth Dropoff, Seychelles
Lewis, Gregg01-Jun-22Blue Marlin, Wahoo, Dolphinfish, Blackfin TunaDestin, FL, USA
Marest, Eric17-Dec-16Blue Marlin, Dolphinfish, Yellowfin Tuna, Wahoo
Guadeloupe
Mason, Michael09-Aug-14Sailfish, Wahoo, Yellowfin Tuna, DolphinfishDenis Island, Seychelles
Pearson, Ray15-Aug-18Black Marlin, Blue Marlin, Sailfish, Yellowfin TunaPuerto San José, Guatemala
Sanchez-Manrique Tavella, Ricardo16-Oct-14Wahoo, Striped Marlin, Dolphinfish, Yellowfin TunaBank off Mancora, Peru
Selisker, Beau28-Dec-20Blue Marlin, Dolphinfish, Yellowfin Tuna, SailfishQuepos, Costa Rica

Senger, Jorn
22-Dec-15Sailfish, Wahoo, Yellowfin Tuna, Dolphinfish
Denis Island, Seychelles
Sitnikov, Sergey07-Feb-19Blue Marlin, Sailfish, Swordfish, Wahoo, DolphinfishDiani, Kenya
Weaver, Karen01-Sep-09White Marlin, Dolphinfish, Yellowfin Tuna, WahooMontauk, NY, USA
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Rick Wallace is a passionate angler and fly fisher whose work has appeared in fishing publications including FlyLife. He's appeared in fishing movies, founded a successful fishing site and spends every spare moment on the water. He's into kayak fishing, ultralight lure fishing and pretty much any other kind of fishing out there.
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