In this article we will discuss about the structure of Apple Snail (Pila) with the help of a diagram. 1. It is commonly called "apple snail" and is found in fresh water ponds, pools and ditches in India and adjacent regions. 2. Shell is external and spirally coiled and is comprised of 6 whorls. 3. The axis around which coiling [...]
In this article we will discuss about the structure of Sea Slug with the help of a diagram. 1. Commonly called “sea slug” or "sea hare" and is an herbivore mollusc. 2. Body brightly coloured, soft and flashy and tapers behind into a tail. 3. Head bears a pair of small sensory and ear-like oral tentacles, retractile rhinophores and a [...]
In this article we will discuss about the structure of Sea lemons (Doris) with the help of a diagram. 1. Commonly called "sea-slugs" or "sea lemons" and are sluggish marine molluscs. 2. Body some what ovoid in shape convex dorsally and flattened ventrally. 3. External or internal shell absent. 4. Mantle large and anus is situated on postero-dorsal side. 5. [...]