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