Question

जल की सतह पर तैरने वाले जीव कहलाते हैं

Answer 1

The most abundant plants in the ocean are known as "phytoplankton".
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Answer 2

Answer:

The organisms swimming on the surface of water is called Necton or Nekton.

Explanation:

The organisms are actively present in all types of water bodies. Ernst Haeckel, a German biologist proposed this term as he wanted to make the differentiation between active swimmers and passive swimmers in a water body more easy. These are carried with the plankton, the current.