Happy Aquarium: Guide to the new "Rescue an Animal!" feature

People who have been checking out the Happy Aquarium demo tank would've noticed a small floating barrel on the upper left corner of the tank. It's clear that there's an animal trapped inside it, and it keeps blowing bubbles that spell out the word: "HELP". That was the teaser to the new "Rescue an Animal!" feature.

Players will encounter it randomly, but once triggered, it operates in the same way as the Monster Expeditions. Because you'll need friends to help you procure a certain number of items to free the trapped creature.