January brings new content to the video game Animal Crossing: New Horizons. If your island is in the Southern Hemisphere there is going to be a slew of new fish, bugs, and sea creatures for players to capture. These new animals can be added to your museum by donating them to Blathers, you'll know if you've caught a new creature by seeing a "Yes!" from your character before they say the name of what you found. Another way to know if you've already donated a creature is to check your Critterpedia to see if the animal has an owl symbol next to their name. Unfortunately, these animals won't be available to players that have their islands set in the Northern Hemisphere.

Here is a list of the new creatures provided by Polygon: 

source: polygon.com