Each spring, millions of tiny, blue-tinted creatures known as Velella velella, or _____, wash ashore in “blue tides” along the U.S. coast.

Each spring, millions of tiny, blue-tinted creatures known as Velella velella, or _____, wash ashore in "blue tides" along the U.S. coast. Sea grapes Ocean drifters By-the-wind sailors Blue star-fish