What type of respiration is seen in molluscs?

Molluscs breathe through ctenidia, which are comb-like gills.

Molluscs, including snails, clams, and squids, breathe through specialized structures known as ctenidia, or comb-like gills. 

These gills are found in the mollusc's mantle cavity and are used to extract oxygen from water and release carbon dioxide. 

The large surface area of the gills allows for efficient gas exchange. 

Some molluscs, such as octopuses, breathe through their skin, but this is not their primary mode of respiration. 

Molluscs do not have lungs like vertebrates or tracheae like arthropods, and they do not breathe through stomata like arthropods.