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