In this article we will discuss about the structure of Opheolepis with the help of a diagram. 1. It is commonly known as "brittle star" and is found in shallow waters. It is usually of green colour. 2. Body comprises of a distinct and some what rounded disc and five narrow, flexible jointed and slender arms radiating from it. 3. [...]
In this article we will discuss about the structure of Octopus with the help of diagram. 1. It is commonly called as “sea-devil” and is a marine and cosmopolitan animal. 2. It is normally found in holes or crevices or under stones along sea bottom. 3. Body globular and is divided into visceral hump and head. The head is comparatively [...]
In this article we will discuss about the structure of Cucumber (Holothuria) with the help of a diagram.1. It is commonly known “cucumber", is marine and shallow waters. 2. Body elongated, cylindrical, broad in the middle and tapering behind. 3. The mouth and anus (cloaca) are situated at opposite ends one being at anterior and the other at posterior end. [...]