Animalia
Echinoderms
Strongylocentrotus
Purpuratus
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
Intertidal area only
Subtidal area only
On the beach
Both intertidal area and subtidal areas
Feet
Mouth
Nose
Spine
Toothpick
Dome
Pentamerous
Porcupine
Algae
Other sea urchins
Small fish
Sea cucumbers