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