Eddies—whirlpools within currents—transport plankton downward from the ocean surface. Satellite image shows the Atlantic, west of Iceland, with patches of blooming plankton

Plankton blooms get sucked into the abyss by eddies

Scientists used a float to follow a patch of seawater off Iceland. They observed the progression of the bloom by taking measurements from multiple platforms. Autonomous gliders outfitted with sensors were used to gather data such as temperature, salinity and information about the chemistry and biology of the bloom—oxygen, nitrate, chlorophyll and the optical signatures of the particulate matter.

At the onset of the bloom and over the next month, four teardrop-shaped sea gliders will gather 774 profiles to depths of up to 1,000 meters (3,281 feet).

Sperm whale checks out ROV in deep ocean

Oceanographer Robert Ballard and his team were exploring the Gulf of Mexico for E/V Nautilus, an expedition to map the Galapagos Rift and gain a better understanding of how life develops around hydrothermal vents on the ocean floor. While looking through the eyes of ROV Hercules, they received a major surprise. The uploaded video captured this unique deep-sea encounter:

Japan's plan to revive its outlawed whaling hits a snag

The Japanese Government had submitted a plan named NEWREP-A for a revamped "research whaling" program for review by an expert panel of the International Whaling Commission. According to this plan, 333 minke whales would be killed annually over 12 years, meaning a total kill of 3,996 animals. This is on top of the nearly 10,000 whales already killed under its scientific permits.