Fishing 2020 is the seventh adventure of 2020. The event maps feature a series of water ponds for you to fish in. You can fish by pressing and holding ↓ or S. After 10-15 seconds, you will get a relic, golden ticket 1, cheese coin 1, seashell 1 or nothing (if you're fishing in the wrong spot).
This event offers the global and Fishing chests.
Both reward one random title, badge, orb, shop item or emoji. The global one—from any event. The Fishing one—from any Fishing event. See here for a list of all rewards from the Fishing chest.