government has discovered a life form (an alien life form on this planetET or otherwiseis what is being implied, but that not being a defined term yet).
There are all those vast millions of square miles under the oceans which have never been explored, as well as many sightings of underwater objects - was an interesting one in the Tic-Tac Nimitz FLAIR video.
Very possibly.
That said, discovering a "new" life form from Earth that was sentient and capable of developing that tic-tac would frankly be just, as if not more, astonishing than discovering extraterrestrial or extradimensional life.