Question

Which of the following are exclusively marine animals?
a) Cnidarians
b) Echinoderms
c) Molluscs
d) Arthropods

Answer 1

Echinoderms are exclusively marine animals.

Sea star, sea urchins, sea cucumbers, sand dollars, sea lilies, are included in this group.

These marine animals are found in every ocean depth including intertidal region and abyssal region of the sea.

These animals are known by their 5 point radial symmetry mostly.

These aquatic animals are important in ecosystems as well as for geological research.