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