Slate Pencil Urchin, Eucidaris thouarsii

Slate Pencil Urchin, Eucidaris thouarsii. Urchin collected off the beach in the greater Los Cabos area, Baja California Sur, May 2020. Pictured urchin: diameter 4.7 cm (1.85 inches); height: 3.3 cm (1.3 inches); spine length 2.2 cm (0.9 inches) to 3.8 cm (1.5 inches).

Slate Pencil Urchin, Eucidaris thouarsii. Underwater photographs taken in Zihuatanejo Bay, Guerrero, March 2018. Photographs courtesy of Ron Woheau, Zihuatanejo.

Slate Pencil Urchin, Eucidaris thouarsii. Underwater photograph taken in Zihuatanejo Bay, Guerrero, December 2019. Photograph and identification courtesy of Maude Jette, Dive Zihuatanejo, www.Divezihuatanejo.com.

Family.  The Slate Pencil Urchin is a member of the Cidaridae Family of Pencil Urchins.

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