Thousands of tourists migrate to Seattle’s waterfront each year to experience the ferry rides, kitschy stores and sweeping views of Elliott Bay.
Jeff Cordell says they’re overlooking something that makes the waterfront even more special: filamentous microalgae.
“Brown scum,” he said on a recent visit at low tide, running a gloved finger through a carpet of slimey growth. “We love to see that. This is really good stuff.”