Overview
- After months of no reliable locations, researchers received a single weak “Z‑ping” from Contender in early July indicating the fin-mounted tag briefly reached the surface but did not produce a fix.
- Contender is the largest great white OCEARCH has tagged in the Atlantic at nearly 14 feet and about 1,653–1,700 pounds, and is estimated to be roughly 30 years old.
- OCEARCH uses fin-mounted Argos-capable tags that need three or more messages in a single satellite pass to calculate a position, so a Z‑ping cannot provide an exact location.
- Scientists say the shark’s long record of seasonal northward movement — more than 7,000 miles of travel since tagging in January 2025 — makes Cape Cod or Atlantic Canada the most likely summer destinations.
- The renewed signal deepens scientific study of the animal’s migration and behavior while prompting local officials and beachgoers to watch for further pings and follow routine safety guidance if more surface detections occur.