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Activity Parameters (As Evaluated for Skill and Level)
Skills
Fishing(35), Magic(37)
Fishing(40), Magic(37)
Fishing(50), Magic(37)
Fishing(60), Magic(37)
Fishing(70), Magic(37)
Fishing(80), Magic(37)
Fishing(85), Magic(37)
Fishing(90), Magic(37)
Fishing(95), Magic(37)
Quests
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--
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Equipment
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Harpoon, Staff of air, Explorer's ring 3
Other
Lumbridge Achievement Diary {Medium}
Lumbridge Achievement Diary {Medium}
Lumbridge Achievement Diary {Medium}
Lumbridge Achievement Diary {Medium}
Lumbridge Achievement Diary {Medium}
Lumbridge Achievement Diary {Medium}
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Input and Output Items and Values
Total Input Value
921 gp
1,052 gp
2,104 gp
1,973 gp
2,104 gp
2,236 gp
2,367 gp
2,499 gp
2,499 gp
Input Items and Item Values
Coins[105]
105
Law rune[3.5]
791
Water rune[3.5]
24
Coins[120]
120
Law rune[4]
904
Water rune[4]
28
Coins[240]
240
Law rune[8]
1,808
Water rune[8]
56
Coins[225]
225
Law rune[7.5]
1,695
Water rune[7.5]
52
Coins[240]
240
Law rune[8]
1,808
Water rune[8]
56
Coins[255]
255
Law rune[8.5]
1,921
Water rune[8.5]
59
Coins[270]
270
Law rune[9]
2,034
Water rune[9]
63
Coins[285]
285
Law rune[9.5]
2,147
Water rune[9.5]
66
Coins[285]
285
Law rune[9.5]
2,147
Water rune[9.5]
66
Total Output Value
11,340 gp
13,230 gp
36,040 gp
38,160 gp
41,340 gp
45,580 gp
47,700 gp
50,880 gp
51,940 gp
Output Items and Item Values
Raw tuna[90]
11,340
Raw tuna[105]
13,230
Raw tuna[85]
10,710
Raw swordfish[85]
25,330
Raw tuna[90]
11,340
Raw swordfish[90]
26,820
Raw tuna[97.5]
12,285
Raw swordfish[97.5]
29,055
Raw tuna[107.5]
13,545
Raw swordfish[107.5]
32,035
Raw tuna[112.5]
14,175
Raw swordfish[112.5]
33,525
Raw tuna[120]
15,120
Raw swordfish[120]
35,760
Raw tuna[122.5]
15,435
Raw swordfish[122.5]
36,505
Fishing XP
Fishing XP Total
7,200
8,400
16,200
16,200
17,550
19,350
20,250
21,600
22,050
Fishing XP by Item
Raw tuna[90]
7,200
Raw tuna[105]
8,400
Raw tuna[90]
7,200
Raw swordfish[90]
9,000
Raw tuna[90]
7,200
Raw swordfish[90]
9,000
Raw tuna[97.5]
7,800
Raw swordfish[97.5]
9,750
Raw tuna[107.5]
8,600
Raw swordfish[107.5]
10,750
Raw tuna[112.5]
9,000
Raw swordfish[112.5]
11,250
Raw tuna[120]
9,600
Raw swordfish[120]
12,000
Raw tuna[122.5]
9,800
Raw swordfish[122.5]
12,250
Skill Activity Ratings (Primary Skill)
Skill Activity Speed (SAS, XP/hr)
7,200
8,400
16,200
16,200
17,550
19,350
20,250
21,600
22,050
Skill Activity Profitability (SAP, gp/hr)
10,420
12,178
33,936
36,188
39,236
43,345
45,333
48,382
49,442
Skill Activity Efficiency for 100k gp/hr Opp. Cost (SAE100k)
-12.44
-10.46
-4.08
-3.94
-3.46
-2.93
-2.70
-2.39
-2.29
Skill Activity Efficiency for 250k gp/hr Opp. Cost (SAE250k)
-33.28
-28.31
-13.34
-13.20
-12.01
-10.68
-10.11
-9.33
-9.10
Skill Activity Efficiency for 500k gp/hr Opp. Cost (SAE500k)
-68.00
-58.07
-28.77
-28.63
-26.25
-23.60
-22.45
-20.91
-20.43
Skill Activity Efficiency for 1M gp/hr Opp. Cost (SAE1M)
-137.44
-117.60
-59.63
-59.49
-54.74
-49.44
-47.14
-44.06
-43.11
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Analysis, Discussion and Tips for Success
General Discussion
Tuna and swordfish are the first fish caught using a harpoon. They are fished at the same spots; you get only tuna from levels 35 to 49, and then a mix of tuna and swordfish. This mix tends to be around 50/50 at pretty much all levels, with a fair degree of randomness from one inventory load to the next.
Note that you get a lot more fish at level 50. It's not just that you also get swordfish, the total number of fish dramatically increases. That makes this method much better for training (and money) at level 50.
Due to the distance to the bank, F2P players may want to consider keeping only swordfish while dropping tuna, as this provides more XP while retaining most of the catch value. Members shouldn't bother, as even Catherby is close enough to the bank that dropping is mostly pointless.
Location and Access
Members should start out in Catherby, and move to the Fishing Guild at level 63 Fishing; there are many more spots there, and they are closer to the bank. (The nominal level for the guild is 68, but you can use an admiral pie at 63.)
Free players need to fish on the docks in Karamja, as the only alternative is in the deep Wilderness.
Required and Recommended Equipment
You need a harpoon to catch tuna and swordfish. Members should use a barb-tailed harpoon, since it can be equipped, saving an inventory slot.
In F2P, for the most efficient method, you also need a staff of air or staff of water, and the Explorer's ring 3 from the Lumbridge Achievement Diary.
Note that at level 70, members who have learned Barbarian fishing can catch tuna and swordfish barehanded.
Required and Recommended Supplies
F2P players need coins for the boat to Karamja and law and water (or air) runes for teleporting.
Familiar Suggestions
At higher levels, I recommend using fishing-related familiars; the ibis and granite lobster increase your effective Fishing level and forage fish themselves (worth good money and a little bit of XP). At lower levels, use a spirit terrorbird or bull ant to reduce the amount of banking, especially in Catherby. If you want to make more money (at the cost of a little XP), use a magpie at level 47 instead of a beast of burden.
Technique and Tips
In P2P, there's not much technique involved. Just go to Catherby at lower levels, or the Fishing Guild at higher levels. Summon a familiar, fish and bank.
In F2P you need to deal with the problem of there being no bank near the fishing spots on Karamja. The most efficient travel method is to equip your Explorer's ring 3 and a staff of air (or water). Put in your inventory a stack of law runes and water (or air) runes, along with the lobster pot. When you need to bank, teleport to Falador and use the bank there. Take out 30 gp. Then use the "cabbage port" teleport on your ring to get near Port Sarim, run south and use the boat to get back to Karamja.
Note that on P2P, it is possible to start fishing Lobster at level 35 using admiral pies, or level 37 using fish pies or fishing potions. You can also catch swordfish at 45 or 47 the same way.
I recommend using admiral pies within 3 levels of the requirement, or fish pies / potions within 1 level. If you just barely boost up to the minimum, you'll spend most of your time eating or drinking and will waste a lot of money.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members. 
