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Project Noah Nature School
Purple spines, ~1.5 inches in diameter without the spines.
"The double spined urchin or
accidently touched. Spines are occasionally white, and young
Size up to 20 cm. Darkspherical body with a blue star-shaped pattern. Long, ...
cracks, active at night. Other species of
Large urchin belonging to the Diadematidae ...
10 cm long, yellow with blue eyes and two black
A small mottled brown and beige banded ...
head-down tail-up position as an adaptation for hiding among
including marine invertebrates such as mussels, crabs,
