Sea Star Biology and Ecology

The video explores the fascinating world of sea stars, highlighting their unique anatomy, physiology, and ecological roles. It features insights from an expert at the New England Aquarium, discussing the sea stars' water vascular system, feeding mechanisms, and their importance as keystone species. The video also covers their adaptations, such as mucus secretion and collagenous tissue, which aid in survival. Viewers are encouraged to explore further with 3D models and aquarium visits.

What is the range of arms a sea star can have?

• 10 to 50

• 5 to 40

• 20 to 60

• 1 to 10

How many species of sea stars are there approximately?

• 3,000

• 500

• 2,000

• 1,000

What is the more accurate term for starfish?

• Sea stars

• Ocean stars

• Marine stars

• Aquatic stars

What is the function of the ampullae in sea stars?

• Excrete waste

• Sense light

• Digest food

• Control water flow into tube feet

How do sea stars consume prey like clams?

• By pushing out their cardiac stomach

• By swallowing them whole

• By using their gills

• By using their tube feet

What is a keystone species?

• A species that is the most colorful

• A species that has a disproportionate effect on its environment

• A species that is the fastest

• A species that is the largest in its habitat

What happens to ecosystems without sea stars?

• They become more stable

• They become less productive

• They become unbalanced

• They become more diverse

What adaptation allows the Slime star to deter predators?

• Sharp spines

• Bright colors

• Loud noises

• Mucus excretion

What is the function of collagenous tissue in sea stars?

• To help them breathe

• To protect them from UV rays

• To allow them to change shape

• To help them swim

What is the primary purpose of the 3D sea star model in visible biology?

• To enhance dissection labs

• To entertain students

• To replace real sea stars

• To sell to aquariums