Fact 1: Echinoderms have a unique water vascular system with tube feet.

Fact 2: Each starfish arm is lined with tube feet.

Given the two facts above, answer the question "What is an example of an echinoderm?" with the following options: 
- a fish
 - eel
 - starfish
 - parasites
 - ferns
 - shark
 - fertile
 - algae


 

   starfish      