Black UFO with tentacles over San Tan Valley, Arizona

On March 23, 2019, at 18:20, a black UFO with tentacles is appeared in the sky over San Tan Valley, Arizona. What is it?

Eyewitness statement:

A black speck in the sky above plane cantrails. from the camera image on zoom the shape was a dome like 1/2 of a ball. there were appendages from the sides and the bottom of the rim of the structure.

Source, 04th April 2019