For the first time, scientists are using satellite technology to monitor the presence of tiger sharks in Brazil's Southeast region. This species is known to be one of the most aggressive sharks worldwide and has been frequently observed in Baía de Ilha Grande, located on Rio de Janeiro's southern coastline. Increases in sightings come after numerous reports from local fishermen and boaters, leading researchers to question the reasons behind this uptick in tiger shark appearances in the region.

Historically, tiger sharks have been prevalent along the coast of Pernambuco, where incidents of fatal attacks have occurred. The research aims to determine if there is a connection between the newly observed groups in the Southeast and those existing in the Northeast. Notably, local residents initially reported sightings of what they believed to be a 'tintureiro' shark, later identified as the tiger shark by biologists. The presence of these sharks had been overlooked, and researchers emphasize that they may have always existed in the area, though they are only now being detected regularly.

The initiative, led by the Pro Shark Institute, represents a significant step in understanding the behavior of tiger sharks in Brazilian waters. By leveraging satellite monitoring, researchers aim to gather data to assess risks posed to local communities and wildlife, contributing to a broader understanding of marine life dynamics. Ongoing research will be critical in evaluating whether these sharks pose an increased threat to public safety and how to manage interactions effectively.