Nekton and benthos are two distinct categories of aquatic organisms, primarily distinguished by their habitat and mobility.
Nekton refers to aquatic organisms that are capable of swimming and moving independently of water currents. These organisms are typically found in the water column and include fish, squid, and marine mammals. Nektonic organisms have the ability to navigate and migrate across different parts of the water body, making them highly mobile.
Benthos, on the other hand, refers to organisms that live on, in, or near the bottom of a water body. These organisms are generally sedentary or have limited mobility and include creatures like crabs, starfish, and various types of worms. Benthos can be found in both freshwater and marine environments, often residing in sediments or on the seafloor.
In summary, the main distinction between nekton and benthos lies in their habitat and mobility. Nekton are free-swimming organisms that inhabit the water column, while benthos are bottom-dwelling organisms that live on or near the seabed.