Question

Describe the different classes of echinoderms using examples.

Short answer

Classes of phylum Echinodermata include Asteroids, Echinoidea, Ophiuroidea, Crinoidea, Holothuroidea,

Step-by-step solution

Step 1. Introduction

Echinoderms are members of the phylum Echinodermata.

Characteristics of Echinodermata:

1. They appear like stars.
2. They are exclusively marine.
3. They have a celomic body.
4. They are triploblastic.

Step 2. Explanation

Classes of phylum Echinodermata include Asteroids, Echinoidea, Ophiuroidea, Crinoidea, and Holothuroidea.

Classes with examples:

• Asteroids - Sea stars
• Echinoidea - Sea urchins
• Ophiuroidea - Brittle stars
• Crinoidea - Sea lilies and feather stars
• Holothuroidea - Sea cucumbers.