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