Bubbles have been in the news lately as social units to help endure the covid lock downs. In the animal kingdom creatures use bubbles to their benefit as well - for defense, protection and fun.
Grasshoppers aerate their bitter blood to create a foamy deterrent from predators; mass mating frogs make a mat of frothy bubbles to protect their fertilized eggs; water spiders fill their aquatic silken nests with a bubble of oxygen making a cozy and inhabitable home. Humpback whales use bubble nets to corral fish while cooperative feeding. Courtship is another opportunity - check out the impressive display the Ruddy Duck male is putting on for the ladies. Bubbles are for fun too! Belugas and dolphins blow round (toroidal) rings from their blowholes as a source of entertainment.