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