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Necton are
1. floating organisms in water.
2. swimming organisms in water.
3. animals associated with aquatic plants.
4. sub-merged plants in water.

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Correct Answer - Option 2 : swimming organisms in water.

The correct answer is swimming organisms in water.

  • Necton (or swimmers) are living organisms that can swim and move independently of currents.
  • Necton is heterotrophic and has a large size range, with familiar examples such as fish, squid, octopus, sharks, and marine mammals.
  • Necton uses salt marshes in differing manners as both resident and transient species.

  • Aquatic organisms generally fall into three broad groups: plankton, necton, and benthos. They vary in how they move and where they live.
    • Plankton is tiny aquatic organisms that cannot move on their own.
      They live in the photic zone. They include phytoplankton and zooplankton.
      • Phytoplankton is bacteria and algae that use sunlight to make food.
      • Zooplankton is tiny animals that feed on phytoplankton.
    • Benthos are aquatic organisms that crawl in sediments at the bottom of a body of water.
      • Many are decomposers.
      • Benthos include sponges, clams, and anglerfish.

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