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