Spotted UFO from close distance while jogging on beach

I spotted an UFO from a fairly close distance while jogging on the beach in the morning. It was huge and lasted only few seconds like around 10 seconds and went away high up and was no longer visible due to cloudy sky. It was in silver color and has silverish hue around it, i didn't see any lights on it. I looked around to see if anyone else had seen it but there was only one fisher man around at that time that i passed minutes ago and was too far away from me that he is barely visible, i dont know whether he noticed it or not, he was gone when i turned around and jogged towards him. It didn't make any sound at all. I'm a 17 year college student. My cellphone signal which used to be very good at that location got completely absent for a minute at that time. When i went there the following day, there were few dead fish and other small sea creatures at that spot.