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