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