From December 19th until December 26th, Chip is visiting Saltwater Shores. He's looking for fish, and you're just the person to catch them for him. Three new fish are temporarily available during this event:
In the water, their shadow will have sparkles around them to indicate that they are a fish special to this event. Bring what you catch back to Chip to see how they (literally) measure up! Reach certain total length thresholds and you'll be awarded with various prizes, ranging from bell ornaments to special furniture to tourney throw nets to Leaf Tickets.
Using your normal fishing rod, you may occasionally pull up 2 special fish rather than just one. Renting Chip's golden fishing rod will always get your 2 fish, but it costs leaf tickets to rent. You can also use tourney throw nets to catch 4 fish at once on the pier.
There are also a number of Chip Challenges to complete for getting certain numbers of special fish or special fish of a certain size. Complete them for Leaf Tickets, tourney throw nets or more special event furniture.
There are 4 trophies that can be obtained for reaching total length milestones: