In this article we will discuss about the structure of Sea Pen (Pennatula) with the help of diagrams. 1. It is commonly known as "sea pen" and is found in the eastern coasts of North America. 2. The colour is usually red and the fully formed colony measures about 10 cm in height. 3. The colony is elongated, dimomorphic, [...]
In this article we will discuss about the structure of spongilla with the help of a diagram. 1. It is a common freshwater colonial sponge found usually attached to sticks or pieces of wood in lakes and ponds. 2. Usually yellowish brown in colour and comprised of numerous small individuals with a common flat base. 3. Every individual is perforated [...]
In this article we will discuss about the structure of Finger Sponge (Chalina) with the help of a diagram. 1. It is a marine sponge called finger sponge or deadman's fingers and is found from Rhodes Islands to Lebrador. 2. It is a highly branched structure of orange red colour and is having a small common stalk. 3. Skeleton is [...]