Other sea urchins
Sea cucumbers
Algae
Small fish
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
Echinoderms
Purpuratus
Animalia
Strongylocentrotus
Porcupine
Pentamerous
Dome
Toothpick
Both intertidal area and subtidal areas
Subtidal area only
On the beach
Intertidal area only
Feet
Nose
Spine
Mouth