Largest animals on Earth spotted off California coast. See the 'pleasant surprise'
Whale watchers in California unexpectedly sighted two blue whales, which are rarely seen in the area during this time.
The largest marine reptile ever could match blue whales in size
Ichthyosaurs, marine reptiles from the Mesozoic era, were enormous creatures that rivaled blue whales in size, potentially making them the largest marine reptiles ever discovered.