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Shark OFF Bimini

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29.95 $29.95

Quick overview

29.95 $29.95

Image result for Shark OFF – The Bimini - Shark Repellent

Shark repellent surfwear jewelry! You know sharks have superpowers, right? You’ve heard they can smell blood in the water for miles. It’s true. But did you also know sharks (and rays) can feel the teeniest amount of electricity imaginable? Our patented active element uses that sensitivity against them harmlessly and naturally.

It's kryptonite for sharks!


  • It's kryptonite for sharks!

  • All natural leather & cording

  • Totally harmless to humans

  • All natural wood beads

  • Fits anyone from kids to adults

  • Hematite beads promote love over fear

  • Does not hurt sharks or rays in any way

  • Harmless to ALL marine life

  • All natural active element (repellent)

  • Every purchase helps The Ocean Cleanup


Yes, the active element dissolves slowly in water. And the wood beads and leather are all natural so exposure to salt water will dry them out. The best way to care for your Shark OFF bracelet is to wear it all the time. Even in the shower or when you wash your hands. Rinsing the salt water off will help it last longer and the natural oils from your skin are good for the leather and beads. If you don't want to wear it all the time then just rinse it, pat dry and store someplace that it will stay dry



Q: How does Shark OFF work?

A: Please see our short How it Works video or ourScience Page for more information

Q: The Shark OFF repellent charms dissolve?

A: Yes, that's how the active element works. The surface of the active element interacts with the water. It dissolves giving off an electrical charge - kind of like an Alka Seltzer, but sloooowly. The process is called hydrolysis. Check out our Science Page

Q: Where should I wear the bracelet for best results?

A: If you have only one bracelet, start with your ankle. Seventy percent of shark bites occur on the lower extremities. If you have two, then wear the other one on your opposite wrist. (Of course if you're just wearing it around town to show it off then your wrist is much better!)

The Science

Over 450 million years of evolution have created one awesome apex predator. You may have heard that sharks can smell blood from miles away, which is true, but did you also know that they can sense the most minute electrical impulses? Using an array called the ampullae of Lorenzini (elasmobranchs like sharks and rays have them), they can pick up ridiculously tiny electric signals. 5/1,000,000,000ths of a volt in fact (yes, that’s billionths). This sense is so fine that sharks can detect the heartbeat of another fish. Scientists suspect the ampullae of Lorenzini may be used for hunting - finding other fish in distress, or in murky waters, or even hiding under sand. 

Shark OFF turns those very senses against the shark. While a super low voltage field (like the rapidly beating heart of an injured fish) may attract sharks, a higher voltage field repels them. Our patented active element gives off enough voltage to make the shark jerk away from it but it is imperceptible to us. The proprietary alloy that makes up the active element emits an electric field in the ocean of about 1.5 volts - billions of times stronger (literally) than what the shark’s ampullae of Lorenzini can feel. The effect on the sharks is absolutely blinding - but you don’t feel a thing.


Lose the Fear   Love the Ocean

Shark OFF was born in bed. No, it’s not a bad joke. The creators of Shark OFF, Shea & Geoff Geist, were in bed watching TV one night. Along came a PBS program (yup, that’s a plug for public TV) calledHow To Repel A Shark Attack: Hunting The Elements. Mike Rowe (of Dirty Jobs fame - Discovery Channel plug too) was interviewing one of the scientists that discovered the technology used in Shark OFF. 

As Mike and Dr. Patrick Rice discussed the shark repellent properties of magnets and rare earth elements, we were totally blown away. We were amazed that we had never seen a product using this technology. Why was this not in beach shops EVERYWHERE? 

After pursuing it further, we found that this research was dedicated to the reduction of shark bycatch in commercial fishing and not as a deterrent against human interaction. Inspired by Shea’s debilitating fear of the ocean and the vision of this unmet need, we dove in to bring this amazing technology to beachgoers around the world. 

So, here we are. We love to help people overcome their misguided fears and allow them to better enjoy the splendors of the oceans – all while providing education about sharks, the extremely limited risk of shark attack, and their important role in the ecosystem.

Our commitment to the product and the science doesn’t end here. After successfully testing the product ourselves in July 2018 with the preeminent Shark Lab (Bimini Biological Field Station) in the Bahamas, we continue to research and test new alloys. As science evolves, expanding our understanding of the oceans' ecosystems, Shark OFF will take a leading role in bringing those advances, and advantages, to you. 

Exhaustive research has been done into the myriad elasmobranch sensory systems. For the purposes of our research Hueter et al 2004 – Sensory Biology of Elasmobranchs summed up those abilities and offered a relatively simple yet comprehensive explanation of our focus - the ampullae of Lorenzini.


As the PBS special indicated, these rare earth elements caused strong reactions in elasmobranchs (sharks and rays) using their ampullae of Lorenzini against them. Since this discovery many experiments have been conducted. The studies cited below tested differing lanthanide alloys in a wide variety of water temperatures, locations, depths, species, captive animals, wild animals, tanks, pens, baits, and methods. These present strong evidence showing the efficacy of electropositive metals as a deterrent, especially in the environments we see our products most being used – shallower, warmer and lower-visibility waters.

NOAA Technical Memorandum

NMFS-PIGSC-16 November 2008

Shark Deterrent and Incidental Capture Workshop

Science backed by the world's leading researchers

Shark Defense.JPG

SharkDefense Technologies LLC

NONE of this would be possible without the groundbreaking discovery and continued research of Dr. Eric Stroud and Dr. Patrick Rice at SharkDefense Technologies LLC. While working diligently to save millions of sharks from incidental death, they gave birth to a technology that will help millions experience the ocean with less fear. You would literally not be reading this right now if they had not dedicated their careers to saving millions of sharks accidentally killed by long-line fishing every year.
Shark OFF LLC is proud and blessed to be the sole licensee of  SharkDefense Technologies LLC's electrochemical patent 8,951,544 B2 and to have their full support and incredible knowledge backing our work. Check out their website for all the information you could ever want to read on electrochemical, magnetic and chemical shark repellents.

Bimini Sharklab

There is no better place in the world for field research on sharks than the Bimini Biological Field Station Foundation. Fact check me. I double dog dare you. Dr Samuel "Doc" Gruber and his crew down in the Bahamas are a top notch group of researchers, PHD's, graduates, students, staff and dedicated volunteers. You will find no shark authority more respected than Doc.


Shark OFF LLC is grateful beyond words for all of the help, guidance, encouragement and sincere friendship of such amazing people. Doc, Angela, James, Kristine, Vital, Sofie, Tory and Nikki to name a few will be in our hearts forever. We look forward to many years of testing in the Bahamas, and around the world,  to continually make Shark OFF the best.

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