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This article is about the room. For the music track, see Aquarium (music track).

The Aquarium is a room in a player-owned house where players can showcase their Fishing skill. Building an Aquarium requires level 63 Construction and 200,000 coins. The room was suggested on the forums and chosen by players in a Player Power poll. The Aquarium can only be built on the ground level, and has 4 doors. Players can only have one Aquarium at a time, but it can be removed and placed somewhere else without losing any progress. The Aquarium is one of the few updates for which a design document was made public.

Aquarium underwater

A player diving in their aquarium

There are five types of hotspots available and special objects for underwater usage:

  • Centrepiece wall - Scenery.
  • Diving suit - An outfit that allows certain daily and weekly rewards to be collected.
  • Supply - Scenery.
  • Prawnbroker - Location and type of shack the Prawnbroker resides in.
  • Fish-head - Scenery similar to the big fish in the Skill Hall.
  • Underwater - Scenery and rewards accessible through certain diving suits.


Before purchasing prawn perks, every 35,000 life points worth of aquarium-related fish fished by the player will receive either a prawn ball, prawn cracker or golden prawn cracker. The prawn balls can be opened by one player, while the crackers have to be used on another player, and both will get a reward. Once in a while when fishing, you will receive a golden fish egg of the type you are fishing, so long as you don't already have that egg. You can also get golden fish eggs from prawn balls or crackers, from golden prawn crackers, from the Motherlode Maw, or once from the Prawnbroker. Players may toggle the option to receive prawn balls while fishing by talking to the Prawnbroker.

Great white shark (Aquarium)

A great white shark.

There are fourteen golden fish eggs to collect, and you can put the eggs in the bathysphere to make a fish appear in your aquarium. Right clicking the bathysphere gives you the option to view your fish list showing you which fish you have found and which ones you still need. Each egg collected will let you unlock one of the fifteen prawn perks at the Prawnbroker. You can also get four more prawn perks by collecting 1, 20, 100 and 200 prawn balls. Unlocking 15 prawn perks is a requirement for the completionist cape, and collecting all 18 prawn perks is a requirement for the trimmed completionist cape.

An additional aquatic creature, the great white shark, is unlocked at the same time Sayln the Shark is purchased from the prawnbroker. Unlike the other creatures, the Great white shark is not lost when the plug is pulled.

If the aquarium is removed, any fish unlocked remain after the room is rebuilt, but all furniture will be lost.

Fishing-icon Lvl Fish Eggs
20 Trout (Aquarium) Trout Golden trout eggs Golden trout eggs
30 Salmon (Aquarium) Salmon Golden salmon eggs Golden salmon eggs
35 Tuna (Aquarium) Tuna Golden tuna eggs Golden tuna eggs
38 Rainbow fish (Aquarium) Rainbow fish Golden rainbow fish eggs Golden rainbow fish eggs
40 Lobster (Aquarium) Lobster Golden lobster eggs Golden lobster eggs
48 Leaping trout (Aquarium) Leaping trout Golden leaping trout eggs Golden leaping trout eggs
50 Swordfish (Aquarium) Swordfish Golden swordfish eggs Golden swordfish eggs
53 Lava eel (Aquarium) Lava eel Golden lava eel eggs Golden lava eel eggs
58 Leaping salmon (Aquarium) Leaping salmon Golden leaping salmon eggs Golden leaping salmon eggs
62 Monkfish (Aquarium) Monkfish Golden monkfish eggs Golden monkfish eggs
70 Leaping sturgeon (Aquarium) Leaping sturgeon Golden leaping sturgeon eggs Golden leaping sturgeon eggs
76 Shark (Aquarium) Shark Golden shark eggs Golden shark eggs
85 Cavefish (Aquarium) Cavefish Golden cavefish eggs Golden cavefish eggs
90 Rocktail (Aquarium) Rocktail Golden rocktail eggs Golden rocktail eggs


Because you receive prawn balls based on how many life points the fish heal, you should generally catch fish that give the highest life points per hour, until you've received that egg, and then potentially move on to the next best. This table lists the 14 fish approximately in order of life points fished per hour at 99 Fishing.

Optimal order for the most Prawn balls
Leaping sturgeon Golden leaping sturgeon eggs
Leaping trout Golden leaping trout eggs
Leaping salmon Golden leaping salmon eggs
Monkfish Golden monkfish eggs
Swordfish/Tuna Golden swordfish/tuna eggs
Lobster Golden lobster eggs
Salmon/Trout Golden salmon/trout eggs
Shark Golden shark eggs
Lava eel Golden lava eel eggs
Rocktail Golden rocktail eggs
Cavefish Golden cavefish eggs
Rainbow fish Golden rainbow fish eggs

If you are 99 Fishing, you can get 50 free Prawn balls by talking to the Prawnbroker, which should be done first as it may provide your first Golden eggs and Prawn pennies/pounds. As eggs are caught, they should be added to the aquarium and the rewarded Perks cashed in. The recommended order of Perks is:

  • 'Greater chance of receiving Prawn Balls'
  • 'Gain a landmark of your choice' - Fremennik longboat decoration
  • Rest of Tier 1 perks
  • Tier 2 perks
  • 'Prawn Pennies and Prawn Pounds last 2x as long'
  • 'Greater chance of receiving Prawn Balls'
  • Rest of Tier 3 perks
  • Tier 4 perks
  • 'Greater chance of receiving Prawn Balls'
  • Rest of the perks


Some decorations are included with the Aquarium by default and some must be obtained from prawn balls and from fishing. Before you can use new decorations you must add them to your Bathysphere by clicking on them and then clicking on the Bathysphere.



Bathysphere surface built

Surface view of the Bathysphere

Bathysphere underwater built

Underwater view of the Bathysphere

The bathysphere is an uncustomisable part of the surface level of the Aquarium. It allows the player to traverse down into the underwater portion of the Aquarium. When activated through building mode, the bathysphere allows access to the customisation interface for the underwater portion of the aquarium. The maximum number of objects that can be placed inside the aquarium is 30.

Right click options on bathysphere are:

  • Operate - takes you into aquarium in your dive suit
  • Clear floor - removes all items from the aquarium floor. Requires building mode. Items unlocked will still be unlocked.
  • View fish list - shows a list of all fish found and counts of Prawnballs found (up to 200+). Allows you to track Prawn perk progress

Centrepiece wallEdit

Centrepiece Construction-icon Lvl Materials Experience Cost
Maps Maps 66 1 Mahogany plank, 1 Message in a bottle 150 2,109
Shark jaw Shark jaw 71 1 Mahogany plank, 1 Shark jawbone 150 2,102
Figurehead Figurehead 78 1 Mahogany plank, 1 Ship figurehead 150 2,077

Diving suitEdit

You need a suit to enter your aquarium. Better suits let players open better decorations. The oyster hunter suit lets players open oysters, the mermaid hunter suit lets players additionally open Mermaid's purse decorations, and the Salvage hunter suit lets players additionally open Treasure chest decorations.

Diving Suit Construction-icon Lvl Materials Experience Cost
Oyster hunter suit Oyster hunter suit 63 5 bronze bars, 1 fishbowl 7 1,284
Mermaid hunter suit Mermaid hunter suit 72 5 bronze bars, 1 fishbowl, 1 porthole 17 1,623
Salvage hunter suit Salvage hunter suit 80 5 bronze bars, 1 fishbowl, 1 telescope lenses 17 1,298


Decoration Construction-icon Lvl Materials Experience Cost
Fishing net Fishing net 64 5 Wool, Rope 6 3,881
Twin anchors Twin anchors 69 5 Iron bars, Rope 54 2,791
Bait barrel icon Bait barrel 74 4 Mahogany planks, 100 fishing bait 577 8,856


The prawnbroker lets players unlock prawn perks, which improve Fishing in a variety of ways. You can also toggle the passive prawn perks effects and prawn ball drops with the prawnbroker, or through Gameplay Settings. The different types of prawnbrokers function in exactly the same way; they are only cosmetically different.

Prawnbroker Construction-icon Lvl Materials Experience Cost
Driftwood prawnbroker Driftwood prawnbroker 63 8 Teak planks 720 4,928
Flotsam prawnbroker Flotsam prawnbroker 73 8 Mahogany planks 1120 16,512
Boutique prawnbroker Boutique prawnbroker 81 8 Mahogany planks, 1 porthole 1130 16,851


Fish Construction-icon Lvl Materials Experience Cost
Mounted swordfish (Aquarium) Mounted swordfish 65 1 Mahogany plank, 1 Raw swordfish 157.5 2,745
Mounted shark (Aquarium) Mounted shark 70 1 Mahogany plank, 1 Raw shark 157.5 3,114
Mounted great white shark Mounted great white shark 76 1 Mahogany plank, 1 Raw great white shark 157.5 3,312


The underwater portion of the Aquarium is uniquely different from the rest of Construction. It has its own hotspot creation tool where items are obtained from prawn balls and prawn crackers or obtained by default. Items removed using the right-click option on the aquarium construction screen are not destroyed but sent back into your pool of buildable items.


Feature Feature
Anchor decoration built Anchor (from prawn ball) Cracked pots (Aquarium) built Cracked pots
Cannon decoration built Cannon (from prawn ball) Rocks (Aquarium) built Rocks
Boots (Aquarium) built Boots Ship bow (Aquarium) built Ship bow
Castle decoration built Castle Ship stern (Aquarium) built Ship stern
Coral reef (Aquarium) built Coral reef Stone head built Stone head


Decoration Effect
Seaweed (Aquarium) built Seaweed Can be retrieved every 24 hours for 14.8 Farming experience and two Seaweed. A maximum of five can be placed.
Kelp decoration built Kelp Can be retrieved every 24 hours for 14.8 Farming experience and two Kelp. A maximum of five can be placed.
Oysters (Aquarium) built Oysters Can be opened every 24 hours if a player has built the Oyster hunter suit or better. Each oyster gives one drop out of Prifddinas gem-rock table. A maximum of five can be placed.
Mermaid's purse decoration built Mermaid's purse decorations Can be opened every week for 20 noted mahogany or teak planks if the player has built the mermaid hunter suit or better. A maximum of three can be placed.
Treasure chest decoration built Treasure chest Can be opened every week for one clue scroll (elite) if the player has built the salvage hunter suit and does not already have an elite clue scroll. Only one can be placed.


Experience decorations increase the chance of finding golden fish eggs at certain fishing spots. They also increase the experience given at those fishing spots by 2%. The decorations do not have to be placed inside the aquarium in order to get the bonus experience; they only need to be stored in the bathysphere.

Icon Decoration Location
White wolf mountain decoration White wolf mountain decoration built White wolf mountain decoration Catherby
Vorago decoration Vorago decoration built Vorago decoration Living Rock Caverns
Fremennik longboat decoration Fremennik longboat decoration built Fremennik longboat decoration Otto's Grotto
Sea troll egg decoration Sea troll egg decoration built Sea troll egg decoration Piscatoris Fishing Colony
Fishing guild decoration Fishing guild decoration built Fishing guild decoration Fishing Guild
Tribal mask decoration Tribal mask decoration built Tribal mask decoration Shilo Village

Prawn perksEdit

Prawn perks from a certain tier can only be activated if all of the perks from the previous tiers have been activated.

Tier 1Edit

  • Greater chance of receiving Prawn Balls
  • No-Bait fishing (doesn't work with Rocktail fishing)
  • 10 Prawn Pennies
  • Gain a landmark of your choice (if you already have all landmarks you will receive 10 Prawn Balls when selecting this perk)

Tier 2Edit

Tier 3Edit

  • Greater chance of receiving Prawn Balls
  • Fly fishing without feathers
  • Prawn Pennies and Prawn Pounds last 2x as long (50 and 200 charges respectively)
  • Gain 3 diving suit cosmetic overrides for the surface

Tier 4Edit

Tier 5Edit

  • Greater chance of receiving Prawn Balls
  • Barbarian fishing without needing any bait (i.e. feathers, fishing bait, fish offcuts, roe or caviar)
  • Great White Shark Pet and Great White Shark in your aquarium
  • Ability to fish Great white sharks from shark fishing spots

Tier 6Edit


Once the Aquarium has been filled with all fourteen fish, the Standard plug decoration can be used. It will reset the Aquarium's caught fish but the Prawn Perks and underwater decorations will not be reset. There are warning messages to ensure that the player understands what will happen by using the plug to prestige.

The first prestige will give the player a Chinchompa plug. While in building mode, open the interface that lets you place items in your tank, then remove your first plug, and select from the menu the next plug. As before, go into building mode and remove, then select from the menu the next one. The second prestige will give the player a Stone of Jas plug.

As of 27 April 2015, prestiging can unlock new barehand fishing animations that can be toggled from the Prawnbroker. The first prestige unlocks silver fishing and the second unlocks gilded fishing. Although it is a skilling animation, the animation cannot be toggled from the Animations interface.



  • On 27 April 2015, an update was added that allowed for Aquarium decorations to stack in your inventory. Players who already had several of the same item already in their inventory had each item stacked individually.
  • In the same update, bare-handed fishing animations were graphically updated, to reflect the fish seen in Aquariums.
  • Aquariums were a largely player driven update. Mod Osborne gave credit to a number of players who helped the development process.
  • The Aquarium can sustain freshwater, saltwater, and lava fish at the same time. Some fish like salmon and trout can be anadromous; being able to live in both fresh and salt water.
  • The examine on the Bathysphere "A rapturous construction." is a reference to the underwater city of Rapture which is first reached by bathysphere in the video game series BioShock.

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