Hundreds of thousands of Velella velella, more commonly known as by-the-wind-sailors, are drifting onto the coastline. Beachcombers say they look like "blue diamonds strewn across the beach."

Glittering blue creatures are washing up on California beaches. Here's why
Hundreds of thousands of Velella velella, more commonly known as by-the-wind-sailors, are drifting onto the coastline. Beachcombers say they look like "blue diamonds strewn across the beach."