Sea Stars

The video explores echinoderms, focusing on sea stars. It describes their radial symmetry, feeding habits, and unique digestive process. The sunflower sea star, the largest species, is highlighted for its size and tube feet. The video also covers sea star predation, their ability to regenerate lost limbs, and interactions with predators like the king crab.

What is the primary characteristic of echinoderms that distinguishes their body structure?

• Bilateral symmetry

• Radial symmetry

• Asymmetrical body

• Segmented body

How do sea stars consume their prey?

• By using their tube feet to crush them

• By trapping them in their arms

• By extruding their stomachs and secreting digestive fluids

• By swallowing them whole

What is the maximum diameter of the sunflower sea star?

• Half a metre

• Two metres

• Three metres

• One metre

Which predator is known to prey on sea stars by removing their arms?

• Sea turtle

• King crab

• Shark

• Octopus

What remarkable ability allows sea stars to recover from losing an arm?

• Regeneration

• Camouflage

• Rapid movement

• Venomous spines