The video introduces echinoderms, a group of marine animals including starfish, sea urchins, and sand dollars. Echinoderms are characterized by spiny skin, radial symmetry, and an internal skeleton. They inhabit ocean environments and possess unique anatomical features like sucking legs connected to a vascular system, aiding in movement and food acquisition.

Which group of animals does the starfish belong to?

• Mollusks

• Arthropods

• Cnidarians

• Echinoderms

What is a notable feature of echinoderms' skin?

• Slimy

• Smooth

• Feathery

• Spiny

Which of the following is NOT an example of an echinoderm?

• Sand dollar

• Jellyfish

• Starfish

• Sea urchin

Where do echinoderms typically live?

• In freshwater lakes

• In the desert

• On land

• In the ocean

What unique feature helps echinoderms move and obtain food?

• Tentacles

• Sucking legs connected to a vascular system

• Fins

• Wings