In the waters of the western Atlantic and Caribbean, a voracious alien predator has taken hold. Native to the Indo-Pacific, the invasive lionfish is a major threat to biodiversity and the health of already stressed coral reef ecosystems.
Last year's catastrophic oil spill in the Gulf of Mexico may no longer make headline news, but the story is far from over. Oceanographers continue to study the long term effects this disaster might have on marine ecosystems.
Tiger sharks are the ultimate apex predators. Scientists use satellite tags and DNA forensic tools to better understand the migrations of this magnificent species and to investigate the impacts of the world shark fin trade.