Protecting and Restoring the Morro Bay Estuary.
Tide pools

Morro Bay Wildlife Spotlight: Balls of Spines (AKA Sea Urchins)

  Is it a ball? Is it a Pokémon? Nope, it’s a sea urchin! Sea urchins, even though common, are really cool! In Morro Bay, there are mainly two species, purple sea urchin and red sea urchin. The biggest difference between the two is their size and color. Red sea urchins can reach up to five inches in diameter whereas purple sea urchins reach only two inches in diameter. The most common species is the pacific purple sea urchin, also known as Strongylocentrotus purpuratus. Sea urchins use their spikes and poison as a defense mechanism. The poison is located at …

Continue Reading