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Fishing Stats
Reel Speed
Bite Speed
Line Strength
Luck
Luck increases your chance of catching higher rarity fish. You can increase your luck with Armor, Pets, and one of your generic location rolls. The rare rainbow event also provides +500 luck for a short period.
The luck formula is as follows:
Rarity % Chance 
100 - (Rare + Epic + Legendary + Mythical) 
30 + (Luck * 0.002) 
10 + (Luck * 0.004) 
4 + (Luck * 0.006) 
1 + (Luck * 0.008)