The sightings, documented in a study by Amy Rose Coghlan and Naiti Morales, took place during a period of unusually warm sea surface temperatures, a condition that has been linked to the expansion of tiger shark habitats in other parts of the world.

The study, led by researcher Isabel Wagner, used a groundbreaking approach. They combined advanced genetic techniques (including target gene capture sequencing and whole-genome re-sequencing), to analyse the DNA of white sharks from across their global range. Eighty-nine individual sharks were examined through target gene capture sequencing, and seventeen sharks were studied through whole-genome re-sequencing. 

A couple from Texas recently endured a terrifying 36-hour ordeal at sea after being swept away by strong currents while scuba diving in the Gulf of Mexico. Their dramatic rescue highlights both the perils of diving in unpredictable waters and the critical need for effective safety protocols.

A new study has shed light on the surprising ways that the great sharks contribute to their ecosystems. They help transport nutrients across marine ecosystems, which involve a variety of forms of marine lifeforms. As the climate warms and human activities continue to alter ocean conditions, their roles are shifting. Some species expand their ranges to cooler waters, affecting new areas and interactions.