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