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