In this article we will discuss about the structure of Ophiocoma with the help of a diagram. 1. Commonly called brittle stars and are found in north Atlantic Mediterranean and tropical west-Indian coasts. 2. The body comprises of a round central disc having leathery (smooth) oral side and granularaboral surface. 3. From the disc radiate five cylindrical arms having four [...]
In this article we will discuss about the structure of Cucumaria with the help of a diagram. 1. It is commonly known as "sea cucumber", is marine and is found in shallow waters. 2. Body elongated, cylindrical, five sided, swollen in the middle and narrow at two ends. 3. The mouth and anus (cloaca) are situated at opposite ends. 4. [...]
In this article we will discuss about the structure of Heart Urchin (Echinocardium) with the help of a diagram. 1. It is commonly known as "heart urchin" and is a marine echinoderm found in shallow waters around coral reefs. 2. Body heart-shaped, some-what ovoid and is having a distinct oral and aboral surfaces. 3. There is neither a central disc [...]