Animals of which group are not fresh water?

Role of the water vascular system in Echinoderms is :
$A.$ Respiration and Locomotion
$B.$ Excretion and Locomotion
$C.$ Capture and transport of food
$D.$ Digestion and Respiration
$E.$ Digestion and Excretion
Choose the correct answer from the options given below :

Which phylum consists exclusively of marine animals?

All of the following are echinoderms,except:

Tube feet are the characteristic structures of

The calcareous ossicles in echinoderms form the