Fishing
You can have a maximum of 4 catches per hour; 32 for a day.
The DM rolls your skill check (Survival or whatever you deem the best option), adding bonuses from equipment, bait, and potions. Bait is used up whether you catch something or not.
Then you will need to match a 4d6 roll result before the timer runs out.
On success you have hooked your catch. Then roll 1d6; on a 1 the line breaks and the catch is gone, otherwise you have caught it.
Equipment, etc.
Reinforced Rod (+1, 10 gp)
Scarab Fishing Rod (+2, 50 gp)
Fishing Bobber (+1, 25 gp)
Fisherman's Pocket Guide (+1, 100 gp)
High Test Fishing Line (unbreakable, 15 gp)
Tackle Box (50% chance to save bait, 20 gp)
Bug Net (1 gp)
Golden Bug Net (10 gp)
Apprentice Bait (+0, 1 sp)
Journeyman Bait (+1, 1 gp)
Master Bait (+2, 5 gp)
Fishing Potion (+1 for 8 hours, 25 gp)
Sonar Potion (see what’s on the line for 8 hours, allows one re-roll per catch, 50 gp)