Size

Test diameter: reaching 6cm (2.25")

Recognition Characters

Disc-shaped. No holes or slits in the body. Densely covered with fine spines. Pentagonal petal design on back.

Color

Different shades of brown when alive. Test is gray in dead specimens.

Habitat & Depth

Lie in sandy areas around reefs.

Distribution at GRNMS

Rare. Found on sandy bottoms away from ledges and rocky outcroppings.

Geographic Range

North Carolina south to Brazil

Behavior & Notes

Burrows beneath sand during day and occasionally forages at night.

Synonyms

References

Humann 1992a