Marine Research Institute of Iceland

On the Iceland Marine Institute website, viewers can check the daily plot points for two blue whales. This whale, as of June 5, had ventured further out from the Icelandic coast on Day 7. (Dagur is Icelandic for "day.")Marine Research Institute of Iceland

Fans of blue whales can now chart the daily movements of a pair of these leviathans, thanks to Iceland's Marine Research Institute (MRI).

On May 29, researchers with the MRI tagged two blue whales with GPS trackers off the Iceland's north coast. The institute has posted a web page for each whale, plotting their precise daily locations -- one whale you can check out here, and the other you can follow here.

Iceland is a prominent summer home for blue whales, which make their living off its waters in warmer months, before swimming more than 3,000 miles to the waters off West Africa in the winter.

The second of the blue whales being tracked by Iceland's Marine Research Institute, in contrast to its gigantic buddy in the photo above, seems happier closer to shore, as seen here on its Day 3 plot point.Marine Research Institute of Iceland

It would be difficult to overstate the size of the blue whale. They're the biggest animals that have ever graced Earth -- larger even than dinosaurs. They're bigger than the biggest bus you could ever ride, and humans could get lost in their blood vessels.

Need more? We're talking length that can clear 100 feet, and weight of a couple of hundred tons. A blue whale's heart alone weighs a literal ton.

The endangered creature is rare to see, and it can live upwards of 80 years in the wild, on a diet made up almost completely of krill (small shrimp-like critters). How can they get by on the tiny-krill diet? Easy -- they eat up to four tons of them, every day.

More about blue whales:

  • Blue Whales' Songs Tracked with Acoustic Tech

  • Rotting Blue Whale Torments Tiny Town

  • Largest Predator Performs Acrobatics to Feed