Location: Cabo San Lucas, Mexico
East Pacific Slate Pencil Urchin
Eucidaris thouarsii
East Pacific Slate Pencil Urchin
Category: Pencil Urchins
Scientific Name: Eucidaris thouarsii
Size: Up to 6 in. (15 cm)
Depth: 3-200 ft. (1-60 m)
Distribution: Gulf of California, Pacific Coast of Mexico to Panama
Echinodermata (Phylum)
└Echinozoa (Subphylum)
└Echinoidea (Class)
└Cidaroidea (Subclass)
└Cidaroida (Order)
└Cidaridae (Family)
└Eucidaris (Genus)
└E. thouarsii (Species)
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© 2026 Florent Charpin