Wait for Summer 6 to 11
Fish at the ocean
Fish between 6:00 AM and 7:00 PM
Use a crab pot? No, Red Snapper is caught by rod fishing
Fish when it is raining
Use bait to increase bite rate
Use a tackle like Trap Bobber or Cork Bobber if available
Check the Traveling Cart if you miss the season
Use a Rain Totem to force rainy weather in Summer
Complete the Fish Tank bundle if needed for progression
Catch it with any fishing rod once conditions are met