Sea urchin — Free Biology Illustration | GPAI | GPAI

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Sea urchin — Free Biology Illustration | GPAI | GPAI

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Sea urchin

Sea urchin

Biology

Sea urchin

Simplified adult sea urchin shown as a nearly spherical marine echinoderm with a small rigid globular central test mostly hidden beneath densely packed long, thin, pointed movable spines radiating evenly outward in all directions, creating a circular starburst-like spiky silhouette. The central body is dark and only subtly visible beneath the dense spine covering. Typical coloration ranges from dark purple and black to deep brown, reddish brown, red, or green.

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PNG

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