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