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