Seismic blasts are used to find oil underneath the ocean floor.

Greenpeace invited researchers from the Scripps Institution of Oceanography aboard the Arctic Sunrise to measure underwater sound levels and study how human activities, like seismic blasting, can affect marine wildlife.

The government's own scientists estimate that seismic blasting to search for oil in the Atlantic could impact as many as 138,000 whales, dolphins, and other sea life – and it could start soon if the Trump administration gets its way.