Drifting with the tide while hoping for whales off Possession Point, at the southern end of Whidbey Island, Washington.

For eons those bluffs we see have eroded to form tide flats below, now full of little live things, including sand shrimp (also called ghost shrimp).

Under the warm waters of spring and summer, the shrimp in their burrows in the sand grow and molt and grow some more.

Every spring, a dozen Gray whales on the northward migration up the Pacific coast from Baja to their Alaskan feeding grounds, turn right into the Strait of Juan de Fuca.

They swim up the Strait to the flats below Whidbey and other nearby islands, and here they stay for months, eating the shrimp.

I've read that if you visit on a summer's minus tide, you can see long pits in the flats made by the Gray whales as they hoovered up the silt and expelled it through their baleen, filtering out the shrimp, and more.