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Deadliest Catch is a master quest that was released on 7 June 2011. The quest was first announced in the Guaranteed Content Poll: What’s My Name? which allowed players to vote on a name for the massive fish, Thalassus, featured in the quest.

Official description

Thalassus has been terrorising the cold and inhospitable oceans to the north. No one has survived to sketch a picture of this hulking beast, but the inns are full of rumours: Thalassus is the size of the Wizards’ Tower, they say; sailors are eaten and digested while still alive in its belly.

Fisherman Jones wants to end the scare stories by landing the beast (gaining a little glory in the process).

Walkthrough

Start pointQuest map icon Speak to Fisherman Jones next to the Fishing Guild bank.
Member requirementP2P icon Members only
Official difficultyMaster Master
Official lengthShort (30 minutes)
RequirementsSkill requirements are not boostable unless marked with a [B] for boostable.
Quest Quests:

Boosts cannot be used for any of the following:

Items requiredItems from the tool belt are not listed unless they do not work or are not automatically added.
  • None

Recommended Items:

Enemies to defeat None
Jones chathead

The hunt begins

Jones, a seasoned fisherman, seeks to obtain glory by capturing Thalassus, a legendary sea monster. Jones is located outside of the bank in the Fishing Guild, hoping to find an experienced fisherman willing to aid him. After speaking with Jones, he will reveal that he needs your help to enlist a rower, obtain a sea chart of the area, and forge a giant harpoon that is capable of bringing Thalassus down. He will give you some harpoon plans.

Sea chart

Jones recommends pickpocketing the master fisher to procure the sea chart as he may not be willing to part with the chart. Successfully pickpocketing the master fisher may take a few attempts.

Giant harpoon

After successfully pickpocketing the master fisher, speak to him about finding a master smith. He mentions that Linza, a nearby smith who is working on a few projects for local fisherman, might be able to help. Be sure to speak to the Master Fisherman before searching for Linza, or she won't show up!

Linza may be found in the small town of Hemenster, located north and slightly east of the Fishing Guild. Speak to her about making a harpoon, and her interest will be piqued when you mention Thalassus. She will agree to make a giant harpoon for you if you are able to secure one of Thalassus's teeth for her.

Linza smithing the giant harpoon

Making the Harpoon

Rower

To recruit a rower for the endeavour, head to the Tower of Life, located southeast of Ardougne. Use of the Ardougne cloak to teleport to the monastery south of Ardougne is recommended, or Fairy ring code DJP is very close by, just head a few steps west.

Speak to 'The Guns', Jones's cousin who may be found lifting a log just outside of the tower. He claims that he would be more than willing to assist with the endeavour, but his seasickness prevents him from travelling out to sea. However, he mentions that his cousin usually made him a sea legs potion whenever they went fishing.

To make a sea legs potion, lowland heather must be combined with builder's tea, which is obtained from Bonafido, another builder who is located in the vicinity. There are patches of lowland heather surrounding the Tower of Life. Searching the patch that is not infected will add some heather to your inventory; trying to search any other patch will tell you that the patch is infested with aphids. After picking out an uninfected patch, ask Bonafido for some of his builder's tea. Use the tea he hands you with the lowland heather to concoct the sea legs potion for 'The Guns'.

Return to 'The Guns' and hand him the newly-brewed potion. Satisfied, he will offer to return you back to the Fishing Guild to meet with Jones.

Thalassus's Curiosity

At sea

Deadliest Catch player tent chathead

After returning to the Fishing Guild and speaking with Jones, he will take the party out to sea. The small vessel will arrive at the wreckage, and certain wrecks must be investigated to reveal parts of Thalassus's trail. This process is identical to the method of tracking various animals in Hunter.

5 mistakes are allowed when investigating the trail. Should you investigate the wrong wreck 5 times, the trail will reset, but the correct solution will remain the same. In addition to the option to investigate the ship wrecks, various items may be looted from the wreckages.

After completing the trail to uncover Thalassus, the monster will surface, knock you and Jones overboard, and swallow Jones. After washing up onto the shore of a small island, three mermaids will mock the expedition and reveal their loyalty to Thalassus. The mermaids are rather confident and must be convinced that Jones, with his giant harpoon, poses a great danger to Thalassus now that he rests in the belly of the monster.

Player speaks to mermaid

The three Mermaids.

Deadliest Catch Boat

Sailing the boat.

To diminish the confidence of the mermaids, the following dialogue options must be chosen:

  1. The Thalassus has eaten Jones the mighty fisherman.
  2. It should, he's been hunting for decades.
  3. Very horrid! After he's killed the Thalassus, he'll probably come after you.
  4. Trust me, I'm a great adventurer, I should know.
  5. Did I mention Jones has a harpoon with him?
  6. It's no ordinary harpoon.

Choosing a different option from the ones listed above will reset the mermaids' confidence and require you to start the dialogue over.

Return to sea

File:Thalassus spits out Jones.png

Jones is alive!

After instilling fear into the mermaids, they will insist on tracking Thalassus down once more in order to force Jones from the beast's bowels. Upon arriving on the boat, it is necessary to track the creature a second time.

When tracking Thalassus the second time, the track uncovered is different from before, but the concept is identical. At the end of the trail, Thalassus will once again surface from the depths, and 'The Guns' will throw karambwan at the monster. Upon eating the karambwan, Thalassus will sick up and expel Jones back onto the boat. On instruction, 'The Guns' will make a break for land.

Note: There is a chance of looting an additional 3 items while hunting Thalassus for the second time.

Finishing up

Back at the Fishing Guild, Jones will reveal that he managed to snag a tooth from the beast. Head back to Hemenster and deliver the tooth to Linza. Return to the Fishing Guild one last time and talk to Jones. Quest complete.

Rewards

Music Unlocked

Salvaging Ships

Each time you hunt the Thalassus, you should aim for these items from the wreckage. You can only obtain one set of 16 Blood Runes, 5302 Coins and 17 Law Runes each hunt but you can get multiple Uncut Rubies and Green Dragonhides.

Priority Item Value
2 Coins x 5302 5,302
1 Blood Runes x 16 Lua error: .
4 Uncut Ruby x 1 Lua error: .
3 Law Runes x 17 Lua error: .
5 Green Dragonhide x 1 Lua error: .

Post-quest - Bonus Thalassus Hunts

Following the quest, players can hunt the Thalassus up to ten more times for a total of 46,660 additional hunter experience. Doing so is a requirement for obtaining the completionist cape. The difficulty increases with each run, adding in new factors such as restricting 'The Guns' energy (and thus limiting how far you can move). The experience is divided as follows:

Run number Experience New elements
1st 2510
2nd 2990 Limitations on 'The Guns' energy. *
3rd 3470
4th 3950 Only two mistakes allowed.
5th 4430
6th 4910
7th 5380
8th 5860

Wind changes compass orientation.

9th 6340
10th 6820

Only one mistake allowed.

Total 46660

* If the player moves only one square at a time no energy will be consumed. Note: During the activity, 'The Guns' energy is equal to the player's run energy. The Oo'Glog Salt Water Spa can be used for 10–25 minutes of practically infinite energy for 'The Guns' to use.

While the path changes for each hunt, the location of the shipwrecks is fixed. This blank map may be used as an easier way to track down the Thalassus. It is recommended to mark each shipwreck which leads the player along the trail

Thallasus map

Blank map for tracking down the Thalassus. (Up is North)

Trivia

  • Thalassus appears to be inspiried by the prehistoric fish Dunkleosteus, as they both share many physical similiarities.
  • On the day of release, the rewards read: "Jones didn't have a strong enough line to reel in the rewards today. Pop back tomorrow when he's got himself a harpoon."
  • Upon completion of the quest the players adventurer's log will read: "I helped Jones hunt down the deadly sea creature."
  • This is the first quest to feature mermaids.
  • The first part of the quest (gathering items and asking 'The Guns' to help) is a reference to Moby Dick.
  • While one needs 70 Thieving to start the quest, the game guide claims 60. It was also stated in the Behind the Scenes - June that the quest will require a thieving level of 60. It also said the required Hunting level was 70 and the required Fishing level was 67, when the quest was released it was the opposite way.
  • This is the first interactable appearance of Linza, one of the seven Signature Heroes, after being mentioned in the first Fremennik Saga, Three's Company.
  • Tentacle's island is a reference to the Odyssey and Greek mythology. When they 'drag' the player ashore, she addresses the player as if she were Calypso.
  • When telling Juna the story of the quest, your character says: "...and we returned to the Fishing Guild where Jones set up shop selling his Miracle Thalassus Protection Cream." at which she replies: "It's a small blessing that the creature can continue to exist."
  • Accidentally walking after finding the Thalassus during post quest huntings will result in allowing you to investigate the final wreckage to finish the hunt. Also "The Guns" get full energy bar, allowing you to search for best loots.
  • The name of the quest is a reference to Deadliest Catch, a reality TV series about crab fishermen on the Bering Sea.
  • Thalassa is the Greek word for sea.
  • 'The Guns' Energy is the player's run energy, every time you enter and exit the hunt you have your energy replenished to 100%. The effect of the Oo'glog salt-water spring works to give 'The Guns' infinite run energy for 10–25 minutes.
  • There used to be another Bank Deposit Box north of Barrows, however this was removed for unknown reasons.
  • Currently, there is a bug that Jones will say you cannot bring your follower even if you do not have a follower. This can be fixed by logging out and back in.
  • Linza mentions during the quest about hunting a creature named Crackjaw. (Crackjaw was one of the other choices for Thalassus.)
  • The Guns real name is Julian, as revealed from Jones.
  • When 'The Guns' throws the karambwan, your character says, "Humpf!" in the chat box, as if he were the one throwing it. This indicates that they make your character take the place of 'The Guns', yet maintain separate overhead (non-chat box) chatter for your character.
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