Tag-A-Giant Foundation

05/05/2026

Thanks to CCA California for honoring our TAG team in the 30 th year for tagging of Giant Bluefin, sharks ,and billfishes In the Atlantic and Pacifc Oceans! TAG is a team sport with great fishers, Captains, engineers, biologists and fishery scientists. Thanks to everyone who has contributed to tagging giants across many countries we have visited! We together ensure big fish have a future in our oceans!

04/23/2026

On our 30 year Tagging Journey we have a new review of bluefin tuna migration!

A Stanford-led effort combines bluefin tuna tag data and historical catch records to reconstruct the evolution of the fishery in the context of extensive movement and mixing.

02/09/2026

🎓🎉 HUGE CONGRATULATIONS to TAG scientist and Block Lab member Dr. Chloe Mikles who successfully defended her PhD thesis last week!

Her groundbreaking research, “Ecological and evolutionary insights into the diversification of Atlantic bluefin tuna,” advances our understanding of one of the ocean’s most iconic apex predators.

We’re all so proud of you Dr Mikles!

02/04/2026

TAG team is out making History on the
F/V Frenzy with Captain Greg Mayer, Tag scientist Rob Schallert, & Stanford tech Ted Reimer tagging giants where it all began 30 years ago with Captains Bob Eakes on the Bullfrog, Gary Stuve & Peter Wright and Charles Perry on Raptor! Today (2026) we satellite and acoustic tagged 6 giant bluefin in the cold and am snow! Call Greg and join us tagging & catching these great fish as they are biting and we release them with Tag hardware for 1-1.5 year journeys!

01/23/2026

Collaborative field science at its finest: three concurrent tagging operations spanning 85° of latitude.

This week our lab spread across the globe to track ocean giants:
🇵🇦 Panama with - Tagging billfish in the Eastern Tropical Pacific
🇦🇷 Argentina with - Following sevengill and school shark migrations through Southern Hemisphere waters
🇺🇸 Central California with and - Continuing our white shark survey season
From temperate coastlines to tropical currents, these simultaneous field efforts help us piece together how apex predators navigate our changing oceans.

Research in Argentina holds permits from the Fisheries and Aquaculture Office of the State of Santa Cruz (File 427.627/24, Disp. 004/25) and from the State Agrarian Council (file 496.703/CAP/24, Res 047/25). Research in California occurs under permit MULTI-2023-005

12/02/2025

Exciting news from the lab! 🎉

Congrats to 4th year PhD candidate Sabrina Daley on her first paper! Her collaborative research paper reveals that reef manta rays at Palmyra Atoll—a remote marine protected area—are remarkably resident to these waters. This research also uncovers what drives manta movement patterns and habitat choices across the atoll.

Link in bio or DM for a copy 📬

10/29/2025

Excited to share our white shark research video with all our tuna friends and fishers!!!

Discover how Monterey Bay scientists are using the latest technology to reveal the hidden secrets of white sharks along the Central California coast.

03/15/2025

We are off to a hot start tagging
bluefin tuna at Oregon Inlet with Captain Greg Mayer on F/V Fishin Frenzy,in our 29 th year in NC! Big fish and pop up satellite tags! Led by Stanford’s Ted Reimer. And Dr. Eyal Bigal. Call us if you want to Tag a Giant!! Or Dm here!

03/01/2025

Two one year tags popped up this past
week from our satellite tagging off Oregon Inlet aboard the F/V Fishin Frenzy with Captain Greg Mayer a year ago! The tags were far apart. One well off the coast of Yarmouth, Nova Scotia another off North Carolina right where we tagged these giants in late February last year. The tags were both Lotek PSAT- Flex tags that we have trialed and advised in manufacturing the past 4 years with our colleagues in Canada. TAG will begin again shortly in North Carolina for our 29th year in NC! Call Captain Greg if you want to TAG A Giant with our team! Or DM TAG!

10/10/2024

TAG scientists collaborate with Norwegian researchers to follow giant bluefin off Norway! The link to the actual paper with the tracks is at the end of the news story under reference.

Marine researchers have tracked the spectacular migrations of the "torpedo of the sea." See where the bluefin tuna went!