a translucent elongated blue body with orange spikes on it's back. White tips are at the end of each spike.

What’s in the Tidepools? – November 2025

(Kelp Crab – NPS Photo/D. Orr) Here is a sampling of what our volunteers observed during November — thank you to everyone who contributed. The nudibranchs are out in force. Remember to send in your photos; we truly appreciate sharing them with everyone. We are entering King Tides season so capture those photos and enjoy. Don’t forget to visit the Tidepool Videos page and our YouTube page. … Continue reading What’s in the Tidepools? – November 2025

A bright glowing worm against a black background

Watch the Glowing Fireworms (Encore)

Fireworms are mating! If you are interested in watching small worms mating & glowing like green light sticks now is the season. VIP Mary has selected September and October for the more intense light show. These fireworms or glowworms, Odontosyllis phosphorea, swim up from the bottom to mate on the surface water for half an hour. When thousands of these worms glow, it makes for a wonderful … Continue reading Watch the Glowing Fireworms (Encore)

A small sample of the hats collected by the Yellowstone National Park Geology Program from sensitive thermal areas throughout the park in 2025. CREDIT: National Park Service photo by Margery Price, September 3, 2025.

Yellowstone employees recover over 300 hats from hydrothermal areas

from popsci.com MARGHERITA BASSI PUBLISHED SEP 13, 2025 10:00 AM EDT It’s a bird! No, it’s a plane! No, it’s your hat, ripped off your head by a gust of wind, spiraling off into the unknown. It’s happened to the best of us. The only thing left to do is purchase another one before your face gets sunburnt. Soon, the destiny of your former hat, along … Continue reading Yellowstone employees recover over 300 hats from hydrothermal areas