Tiny UFOs !?

Something to ponder over what I read on a site
All of us are focused on identifying the large visible extraterrestrial UFOs. These UFOs are not easy to locate as they use gravity waves and electromagnetic flux for creating effecting shield. The shields make them effectively invisible with our terrestrial technologies. The technology of stealth is much superior in nature.
However, there are many micro level UFOs and Unidentified Submerged Objects (USOs) that hover our atmosphere and under ocean water of extraterrestrial origin. These micro UFOs and USOs forms the basis of collecting information on our earth for the advanced extraterrestrial civilizations.
The micro UFOs have life forms. They multiply and evolve just like any other life forms in the earth. Their organic nature makes it impossible for us to be able to recognize them. These micro UFOs and USOs collect information on a daily basis and transmit the same to the extraterrestrial organizations. Something like the NANO Technology we have developed...doesn't it seem obvious that ETs far far ahead of us could have developed superior Nano Tec than us that can escape our eyes and also the 5 senses !