Shelly catches 2 less than five swordfish each time they go fishing, for a total of 5-2=<<5-2=3>>3 fish per trip.
Sam catches one less swordfish than does Shelly on each trip, or a total of 3-1=<<3-1=2>>2 swordfish per trip.
Together, they catch a total of 3+2=<<3+2=5>>5 swordfish on each trip.
If Sam and Shelly go fishing 5 times, they catch a total of 5*5=<<5*5=25>>25 swordfish.
#### 25