By Jonathan Amos
Science correspondent, BBC News, Chicago
Scientists say that tuna swimming in the Gulf of Mexico during the Deepwater Horizon oil spill may have experienced heart damage.
Lab research has demonstrated how crude oil chemicals can disrupt heart function in the fish.
The study, published in Science magazine, is part of the ongoing work to try to understand the impacts of the disaster.
The gulf is an important spawning ground for bluefin and yellowfin tuna.
Tracking studies have indicated that many of these fish would have been in the area during the 2010 disaster.
Scientists have long known that certain chemicals in crude oil – such as polyaromatic hydrocarbons (PAHs) – can be harmful to the hearts of embryonic and developing fish.
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