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