This page of our guide to Animal Crossing New Horizons describes C.J., an avid angler.
If you like fishing, then C.J. will be your best friend in Animal Crossing. This beaver is a true angler. C.J. also organizes regular fishing tournaments.
When does he show up?
C.J. appears on your island on random days and during fishing tournaments.
Where to find him?
If C.J. appeared without any particular reason, you will find him somewhere on the island. But if he is hosting a tournament, you will meet him on the main square.
What can he do?
Whenever C.J. visits your island, you get a chance to earn more from fishing (more on how to do it effectively here). This fisherman buys fish from you for 150% of their price.
Additionally, C.J. will prepare models of fish for you - as long as you provide him with three copies of the same specimen. You will get the model in the mail the next day.