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