Florent's Guide To The

Tropical Reefs

Longspine Heart Urchin
Maretia planulata
Longspine Heart Urchin
Also known as: Hearth Heart Urchin
Category: Sea Urchins
Scientific Name: Maretia planulata
Size: Up to 2 in. (5 cm)  
Depth: 3-150 ft. (1-45 m)
Distribution: Indo-Pacific
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Spatangoida (Order)
   └Maretiidae (Family)
    └Maretia (Genus)

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© 2025 Florent Charpin