What do the blue orbs on Gyms mean in Pokemon GO?

The Season of GO has finally arrived in Pokemon GO. With it comes the first major content update to the game: Ultra Beasts.

What Does the Blue Background Mean in 'Pokémon GO'?

What do the blue orbs on Gyms mean in Pokemon GO?

Pokemon Go' Blue Glow Around 'Pokemon': What Does it Mean?

glow orb cday!

Blue Orb in Sun and Moon

Niantic Charges Pokémon GO Sponsors Up To 50 Cents Per Visitor

What are the blue orbs on Gyms in Pokémon Go? - Gamepur

What do the different circles under each Pokemon mean? Ex. I got this screenshot with a whirlpool under the bunnelby, a sort of ripple circle under the passimian, and a sort of

What is this glowing orb? I've had it all day and it won't go away. Can't interact with it either. : r/TheSilphRoad

Anyone else experiencing these orbs instead of Pokémon spawning after the new update?? : r/TheSilphRoad

Pokemon Go Tour: Hoenn - Global Event Guide and All Research Tasks - Pokemon GO Guide - IGN

How to battle in gyms in Pokémon GO

What happened to the gold poke stops? : r/pokemongo

Gyms in Pokémon Go: How to train, claim and win - Polygon