Fishing

Fishing is an activity accomplished by using a Fishing Pole at a body of liquid (water, honey, or lava) while having bait in the player's inventory. While near the body of liquid, clicking a point over the liquid will cast a line into the liquid. Click again when the bobber moves up and down in order to reel in the line and, hopefully, an item will come up with the line.

Fishing mainly provides crafting materials for potions but is also the source of several interesting items like the Weather Radio. Through crates, it can also be used as an alternative method for obtaining ores, coins, and some chest items. Fishing is however not necessary for game progression and can be entirely avoided during gameplay.

Requirements
75 connected tiles of liquid are required (1,000 for oceans, 50 for honey) in order for fishing to work. The width of the top row of continuous liquid tiles (the row where the fishing bobber sits) determines the calculated pond width, and then the depth directly below those is counted. If the pond becomes wider at lower depths, that additional width is not counted. The player may successfully fish in a 1 tile-wide pond, as long as it's 75 tiles deep. The distance of the bobber to the shoreline does not matter.

It is not possible to fish when the player is submerged in liquid, even partially, and even within a completely disconnected body of water. Fishing can however be done while moving, flying, while grappled to blocks, while floating on water with the Slime Mount, or while standing on top of water, eg. using Water Walking Boots. Fishing can be done in Lava, but will only work with the Hotline Fishing Hook.

Fishing Quests
Catching a quest fish for the Angler NPC requires fishing in the proper biome and height for the day's current quest, which can be determined by talking to the Angler. Quest fish cannot be caught if the player already has that particular quest fish in their inventory, or if the quest fish was already turned in that day. However, if you put the Quest fish in your safe/bank then you may catch another Quest Fish. You can then transfer the Quest Fish to a chest if you wish. The Angler gives out special rewards when a proper quest fish is turned in. You don't need to speak with him beforehand, nor have even encountered him, but the chances of finding the correct area to fish for a quest are much lower without speaking to him first.

Factors
Given the prerequisites for fishing are fulfilled, a number of factors influence the quality/rarity of the caught item. There is a variety of relevant equipment: All the factors are combined into a total "Fishing Skill" or "Fishing Power" that determines the chances of higher-quality catches. Percentages in the tables below that influence Fishing Skill are marked or.
 * A half-dozen accessories are useful, all of which are quest rewards from the Angler (Later combined into just two, at the Tinkerer's Workshop.)
 * Three potions help with fishing, all of which can be crafted or received from the Angler.
 * Fishing Poles can be crafted, received as Angler rewards, bought from other NPCs or found in chests.
 * Bait comes from multiple sources: Captured Critters, Angler rewards, Crates, and even crafting.


 * The Fishing Power of the Fishing Pole used.
 * The Bait Power of the Bait used.
 * Equipped items and Potions.
 * The time the player is fishing. (note that all the factor of time is multiplied by the bait power above, and will round down after the calculation of each one).
 * The size of the lake. Lakes with fewer than 300 tiles incur a Fishing Power penalty.
 * When fishing without the High Test Fishing Line, or Angler Tackle Bag, there is always a 1 in 7 chance that the fishing line will break on reel-in, forfeiting the caught item. Chances of consuming bait remain the same even if the line breaks. With the High Test Fishing Line equipped, the line never breaks.

For example, if you have the Golden Fishing Rod, Master Bait, full Angler set and Angler Earring equipped, with the buff of the Fishing Potion, and it's Raining, at 5:00 am, at New Moon, your fishing power will be calculated as following: This gives a total of 196 fishing power.
 * 1) Add the fishing power of the Fishing Rod, Bait, Equipment and buff, so it's 50+50+(5+5+5+10)+15=140.
 * 2) Apply the influence of the weather: 140*(1+20%)=168.
 * 3) Apply the influence of the time: 168*(1+30%)=218.4, round down, 218.
 * 4) Apply the influence of the Moon Phase: 218*(1-10%)=196.2, round down, 196.

Fishing Poles
Fishing Poles are used with Bait for Fishing. Some are craftable, while others are either sold by NPCs, found in Chests, or are awarded by the Angler.

Trout.png Fish
These items can be caught at any time. Most can serve as crafting material for Food (Cooked Fish) and other Potions. Some can also craft other item types. Jellyfish can be used as bait. Most can be sold to NPCs.

Slimefish.png Quest fish
These are fish items that can be caught only when their particular quest is active, and serve no purpose other than acquiring quest rewards. Their catch chance is around 1:10. You can determine the day's quest by speaking to the Angler NPC. There are 39 distinctive variants of quest fish.

Scaly Truffle.png Usable Items
These items can be used directly without further crafting. Most are Tools or Weapons, many of which are best-in-class for large parts of the game. There are also a couple of Accessories offering jump boosts, an improvement on Healing Potions, a Pet, and in Hardmode a mount summon. The Angler's rewards fill out the set somewhat, with an early mount, a top-tier (Pre-Hardmode) Hook, and several items to help with fishing.

Wooden Crate.png Crates
Crates are stackable grab-bag type items that each contain random loot including potions, bait, useful items, coins, metal bars, and even ores. They can be right-clicked from within the player's inventory, which will unload their contents. Rarer Crate types contain more valuable loot; however, only Wooden Crates contain ores. The biome crates can provide items otherwise found only in the matching biome chests, including Crimson Hearts/Shadow Orbs and the items found in Dungeon chests. (Not all biomes or special chests have matching crates.) Crates are one of the major sources for "alternate" metals and ores.

Tin Can.png Junk
These items have no use or coin value. They can each be stacked up to 99 in a single inventory slot. You will only "catch" these if a lake is too small or if your Fishing Power is too low. When a lake is at least 300 tiles (200 for honey) in size or your total fishing power is at least 50 you will no longer catch junk.

Note that the Seaweed junk item should not be confused with the pet summon item, which is not found by fishing.

Catch Frequency
When fishing, there is a hidden catch counter which tracks your progress toward making a catch. The counter starts at 0 and increases over time. When it exceeds 660, there is a ((75 + Fishing Skill) / 2) % chance that a fish will bite, capping out at 125 Fishing Skill. The counter then resets to 0, regardless of whether or not there was a bite.

The catch counter increases every tick (there are 60 ticks per second) according to these factors:


 * 1-2 points by default (average 1.5 points per tick)
 * A 1 in 60 chance of 60 points (average 1 point per tick)
 * Fishing Skill / 30 points per tick (e.g. 1.667 points per tick at 50 Fishing Skill)
 * A (Fishing Skill / 3) % chance of increasing an additional 1-2 points (e.g. an average of 0.25 points per tick at 50 Fishing Skill)

For example, with a Fishing Skill of 125, you can expect to catch a fish around once every 1.5 seconds:


 * 1) (1.5 + 1 + (125 / 30) + 1.5 * (125 / 3)% ~= 7.29 catch counter per tick
 * 2) 660 / 7.29 ~= 90.5 ticks per bite
 * 3) 90.5 / 60 ~= 1.5 seconds per bite

Biomes
A player can be eligible for catching fish from multiple biomes at once; however, certain biomes take priority over others. The priority order is:


 * 1) Lava
 * 2) Honey
 * 3) Corruption = Crimson (when in both, there is a 50% chance of each, except for crates for which Corruption takes priority)
 * 4) Hallow
 * 5) Dungeon (crates only)
 * 6) Snow
 * 7) Jungle
 * 8) Mushroom
 * 9) Ocean
 * 10) Sky (Forest)
 * 11) Underground/Cavern (Forest)
 * 12) Surface (Forest)

Note that the background and music playing have a different priority order and will not necessarily match which biome is used for generating fish; for example, if Jungle music is playing but there is enough Snow nearby, you will not be able to find Jungle quest fish and will get Snow catches instead. Additionally, Mushroom Biome catches require 200 mushroom tiles nearby, which is more than is needed to display the mushroom biome background and music.

If a player is in multiple biomes but the higher priority biome does not generate a fish, the game will proceed to checking for fish in subsequent biomes. The one exception is that Corruption and Crimson biomes will skip over Hallow in subsequent checks.

Layers
The height requirement (Sky/Surface/Underground/Cavern) is set by the height of the surface of the water, not by the position of the player. This can be taken advantage of by creating two adjacent pools of water on different layers. This allows the player to fish in either while standing at the same spot.

There are five height zones for fishing (see Layers):

Catch Quality
There are 6 different catch quality slots for catches, each with its own associated probability:

These values are rounded down. A Fishing Skill of 85, for example, would have a 1 in 52 chance of an Extremely Rare catch.

When a new fish is generated, each different catch quality is checked for success, separately from one another. For example, the Uncommon, Rare, and Very Rare rolls might all succeed, while the Common and Extremely Rare rolls fail. Then, depending on which roll(s) succeed as well as factors such as height and biome, the game will generate a fish.

With some exceptions, the highest catch quality roll that succeeded will take priority over lower catch quality slots in determining which fish a player receives. However, not every catch quality slot will contain a fish that can be caught; in that case, the game will move on to checking lower catch qualities. Success at the higher catch quality roll will not carry down to lower quality slots. For example, if the Rare roll succeeded but there is no Rare fish available to be caught, the game will move on to checking whether or not the Uncommon roll succeeded; if the Uncommon roll failed, it will move on to checking Common.

Each biome has a list of available biome-specific fish that can be caught there, based on the catch quality rolls and other factors. If no biome-specific fish is generated, the game will move on to checking subsequent, lower priority biomes. Many of the fish available in catch quality slots vary based on randomness, so succeeding at a catch quality roll in a specific biome does not guarantee that you will get a specific fish of that quality, or any fish of that quality at all. If no fish is selected for the slot, the game will proceed to check more common slots instead, and move on to subsequent biomes if and only if none of those slots contain fish either.

When fishing in water, a successful Extremely Rare roll will always check for a special catch first (Frog Leg, Balloon Pufferfish, and Zephyr Fish, in that order). If none of these checks succeed, the game will then check for biome-specific fish.

All quest fish occupy the Uncommon slot, except the Mirage Fish and Pixiefish, which are Rare.

There are only two Plentiful fish: Bass and Trout. If all other checks fail and you are fishing in water, you will catch one of these by default: Trout if fishing in the Ocean, and Bass otherwise. If fishing in lava or honey, no fish will be generated and there will not be a bite.

Crates
There is a separate roll to determine if a Crate is caught, defaulting to 10% (or 20% with a Crate Potion active). An Extremely Rare or Very Rare catch will generate a Golden Crate, a Rare catch will generate a biome-specific crate (if applicable, otherwise it will generate an Iron Crate), an Uncommon catch will generate an Iron Crate, and a Wooden Crate otherwise. Fishing in lava or honey will never generate a crate.

Stack Sizes
Stackable fish (i.e. Bomb Fish and Frost Daggerfish) generate in stacks that vary based on your Fishing Skill. These can vary significantly, with higher Fishing Skill levels generating higher minimum stack sizes as well as significantly higher maximum stack sizes.

Tips

 * There are a number of decent ways to collect bait, and the presence of NPCs will cause Critters to spawn in place of monsters, allowing large amounts of bait to be collected in relative safety.
 * The Forest provides numerous different sources of bait, such as Worms, Grasshoppers, Butterflies and Fireflies.
 * Butterflies primarily spawn in the morning, and Fireflies are numerous on new moon nights.
 * Worms can be crafted into Enchanted Nightcrawlers to increase their bait power.
 * In The Hallow, Lightning Bugs will replace Fireflies.
 * Wearing Flower Boots and destroying the plants spawned by the boots will generate many Worms and Grasshoppers.
 * Shooting a Flare Gun at the player's feet will automatically destroy these plants, producing a massive stream of bait creatures.
 * Large plants will automatically grow on sections of Jungle grass, whether natural or artificial, and frequently drop bait when destroyed. In order of increasing rarity and bait power, the bait items available from Jungle plants are Grubby, Sluggy, and Buggy.
 * Water Candles and Battle Potions can be used to increase the spawn rate of critters, while the NPCs still prevent hostile spawns.
 * A Crate Potion will increase the number of crates a player catches, which may include Journeyman and Master Baits.
 * The Angler gives six different accessories as rewards, but with the Tinkerer's Workshop those can be combined into one functional and one informational accessory:
 * The Tackle Box, High Test Fishing Line, and Angler Earring combine into the Angler Tackle Bag.
 * The Angler Tackle Bag’s fishing power bonus will stack with another Angler Earring.
 * The Fisherman's Pocket Guide, Weather Radio, and Sextant combine into the Fish Finder.
 * Sonar Potions allow players to selectively reel in desired catches.
 * Opening the inventory and discarding an item or block will cause the player to cast two more fishing lines each time, allowing increased chances for bites at the cost of extra bait. Autopause is required for this to work on.
 * Make sure the Truffle Worm is not the upper-leftmost bait item, unless you are trying to summon Duke Fishron at the Ocean.
 * While quest fish cannot be fished or picked up when that it is already in the player's inventory, it's easy enough to stash the fish in a Chest or Piggy Bank. Note that quest fish do not stack.
 * The same daily quest will be given to all players on a world, and players can finish quests with a quest fish that was received from another one.

Trivia

 * The Neon Tetra and Golden Carp have no use, aside from their coin value. The Golden Carp is especially valuable at.
 * The Clownfish quest description is a reference to the 2003 Pixar film, Finding Nemo.
 * The Batfish quest description is a reference to the iconic Batman Theme.
 * The Double Cod is required to make an Ammo Reservation Potion, possibly a reference to the acronym for the popular first-person shooter Call of Duty.

History
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