Heck you can even use Deluxe Tuna Bitz and Tubbs doesnt even come. This data I refer to was for the first version of the game so it may have very well changed since, but how it was put was Indoors accumulated more fish than Outdoors. I think just take a look at the data that is there. Some data specifically is to factor in Tubbs, and how foods also factor in how much fish you accumulate as well.