Animalia
Purpuratus
Echinoderms
Strongylocentrotus
Mouth
Nose
Feet
Spine
Because sea urchins have large numbers of relatively big eggs
Because the eggs make great omlettes
Because sea urchins have large numbers of eggs
Because a sea urchin's egg is relatively big
Toothpick
Porcupine
Dome
Pentamerous
Algae
Sea cucumbers
Small fish
Other sea urchins
Subtidal area only
Intertidal area only
Both intertidal area and subtidal areas
On the beach