In this article we will discuss about the structure of Aurelia with the help of a diagram. 1. It is a cosmopolitan jelly fish which is found in coastal waters. 2. The adults are exclusively medusoia forms. 3. The polyp is represented by schyphistoma and hydra tuba stages. 4. The body is like an inverted bowl or umbrella and is [...]
In this article we will discuss about the structure of Valella with the help of a diagram. 1. It is a small pelagic and marine colony in the tropical seas. 2. It is discoidal in shape and is of bright blue colour. 3. The disc is generally oval and flat, but may also be some-what rhomboidal in some cases. 4. [...]
In this article we will discuss about the structure of Porpita with the help of a diagram. 1. It is a marine and polymorphic colony found in abundance around southern Atlantic coasts. 2. It is discoidal in shape and thus resembles a medusa. 3. A distinct and independent float is absent, but the disc is chitinous, multi-chambered and encloses [...]