The great white shark named Contender, the largest tagged male in the Atlantic, has been spotted traveling along the US and Canada coastline. This nearly 14-foot, 1,650-pound predator was pinged off North Carolina, Maine, and most recently Nova Scotia, Canada, on July 11. As shark sightings surge in places like New York and California, scientists say warming oceans are shifting shark movements closer to shore.
Contender's Journey: A Record-Breaking Migration
Contender, estimated to be 30 years old, was first tagged by Ocearch in January 2022. He migrates seasonally between Florida and Canada, and his latest pings confirm he is summering in Canadian waters. This massive shark has become a symbol of how large marine predators adapt to changing ocean temperatures.
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Why Are Shark Sightings Increasing?
Rising ocean temperatures due to climate change are altering the habitats of several shark species. Bull sharks, for instance, have been observed moving further north along the US east coast. This northward shift brings sharks into areas where people swim, surf, and fish, increasing the likelihood of encounters.
According to Shannon Barry, a researcher at the Florida Institute of Technology, bull sharks are increasingly found in nearshore, low-salinity environments like estuaries and rivers. This is a significant change from their historical range.
Shark Sighting Data: A Comparative Look
| Location | Sightings in July | Species Noted |
|---|---|---|
| Rockaway Beach, New York | 16 | Various |
| California Coast | Multiple | Great white, others |
| Nova Scotia, Canada | 1 (Contender) | Great white |
Key Takeaways for Ocean Enthusiasts
- Shark sightings are rising along the US and Canada coasts due to warming waters.
- Contender is the largest tagged male great white in the Atlantic, weighing over 1,650 lbs.
- Ocearch's satellite tagging provides critical data on shark migration patterns.
- While attacks remain rare, beachgoers should stay informed about local shark activity.
What Does This Mean for Beach Safety?

Despite the surge in sightings, the risk of a shark attack remains extremely low. Scientists emphasize that sharks are not targeting humans, but rather following prey and suitable water temperatures. However, increased presence near popular beaches means swimmers should heed local warnings and avoid swimming at dawn or dusk when sharks are most active.
How Ocearch Tracks Sharks
Ocearch uses satellite tags attached to dorsal fins to track sharks in real time. Each time a shark surfaces, the tag sends a signal, allowing researchers to map their movements. This data helps predict where sharks may appear and informs conservation efforts.