One day, during a break on one of his beach walks, Goedert came across a mound that had washed ashore of kelp holdfasts — the root-like structures that fasten the towering algae to the seafloor.

Early Oligocene kelp holdfasts and stepwise evolution of the kelp ecosystem in the North Pacific. Proceedings of the National Academy of Sciences, 2024; 121 (4) DOI: 10.1073/pnas.2317054121; ...

A fossil showing kelp 'holdfasts,' the root-like structures that serve to tether the algae to the seafloor. Steffen Kiel. Asking a fossil how old it is. THANKS TO OUR SPONSOR: Become a Sponsor.

An X-ray reconstruction of a 32-million-year-old fossil kelp holdfast colored to show the base (orange), holdfast (yellow) and the bivalve shell to which it attached (blue). The unique underwater ...

Kelp’s holdfast, or rootlike structure, can host more than 90 animal species. Zooplankton, for example—full of the carotenoids that make salmon flesh pink—appear at higher rates in Kelp forests than ...

T he top of the kelp forest emerges from the surface of the Monterey Bay recently as a pelican wings by a resting paddler near Lighthouse Point in Santa Cruz. Held upright by gas-filled bladders ...

Newly discovered kelp fossils peg their existence to 32 million years ago. These fossils may help explain how the Pacific Ocean's underwater 'forests' came to be.

Kelp: Hidden Treasure of the Salish Sea. Season 14 Episode 1403 | 26m 42s Video has Closed Captions | CC. Experts are working to conserve and restore the Puget Sound’s declining kelp forests.

There are a lot of kids in the “Hold Fast” exhibit about kelp forests. They’re running through a display of 27 kelp plant images, printed on silk sheets that hang from the ceiling to the floor.

The unique underwater kelp forests that line the Pacific Coast support a varied ecosystem that was thought to have evolved along with the kelp over the past 14 million years. But a new study shows ...