Fat innkeeper worms, also known as 'penis fish,' strand on Marin Beach

The so-called Penis fish are making headlines in the Bay Area after thousands strand on a Marin beach.

Urechis unicinctus

Fat innkeeper worms, also known as 'penis fish,' strand on Marin Beach – Queen City News

Elaine J. Hanford's Bulletin Boards: 1) Geoscience; 2) Environmental Science; 3) Coastal Zone Management - 23 December 2019 - WaterWired

Dragunfire A view through the Dragon's Eye

Penis fish' wash up on a beach in California

Penis fish' wash up on a beach in California

Thousands of Pulsating 'Penis Fish' Washed up on a California Shore

Fat innkeeper worms, also known as 'penis fish,' strand on Marin Beach

Penis fish' wash up on a beach in California