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