What organisms float on water surface?
Neuston are organisms that live at or immediately adjacent to the air-water interface. Some rest on top of the surface film, termed epineuston, while others occupy its underside, termed hyponeuston. Examples include water striders, floating microbial communities, certain algae, fish eggs, larvae, and small invertebrates. Surface tension creates a specialized habitat, and strong gradients in light, temperature, oxygen, and chemicals distinguish it from deeper water. Wind can aggregate neuston into slicks, while ultraviolet radiation and pollutants concentrated at the surface impose stress. Bent
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 2-3
