Florent's Guide To The Florida, Bahamas &

Caribbean Reefs

Slate Pencil Urchin
Eucidaris tribuloides
Slate Pencil Urchin
Category: Sea Urchins
Scientific Name: Eucidaris tribuloides
Size: 1 to 2 in. (2 to 5 cm)  
Depth: 3-160 ft. (1-50 m)
Distribution: Caribbean, Bahamas, Florida, Brazil
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Cidaroida (Order)
   └Cidaridae (Family)
    └Eucidaris (Genus)

Echinoderms
Sea Urchins

Slate Pencil Urchin

Long-Spined Urchin

Red Heart Urchin

Rock-Boring Urchin

Reef Urchin

Variegated Urchin

Jewel Urchin

West Indian Sea Egg



All Photographs
© 2025 Florent Charpin