Seven United States Postal workers in Corpus Christi Texas were outside on a break from work at around 6:15pm October 25th 2021. All seven witnessed a low black dot in the sky slowly moving under the cloud coverage then stopped & hovered for thirty minutes in same spot of sky stationary. Myself ran to my truck and grabbed a pair of binoculars to see what it was exactly. We thought drone at first until it came in clear through my binoculars lenses. I witnessed a craft I cannot truly even describe as it was so alien to me. Here is the best description; neon green dome or translucent neon bubble with three black jagged appendages pointed downward from green bubble, three dark purple portholes only on one side when craft rotated. Note I could see craft clear as day thru binoculars. No sound. No wings, no propellers and definitely not a drone as I saw with my own eyes!!! Video and pictures don’t do it justice as to what I truly saw. Object sat stationary for about 45min before accelerating directly upwards and out of sight. No trail I’m in shock that something like this was just out in daylight over our heads! Amazing but scary