Ammonite Crab

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Ammonite Crabs can be found on the most coastal areas and the most northern beaches of Fossil Island. They cannot be attacked by dwarf multicannons. They are popular among players for training.

Training Combat[edit | edit source]

Ammonite crabs are one of the creatures that are recommended as training monsters for members. They are used by members to train combat as they have high hit points and they have low defence and attack, meaning that the player takes little to no damage and can afk train on them. This involves running to a location where 2 or more crabs are spawned and attacking them. It will take a short while to kill one, with another one attacking at the same time but they do no damage so this is safe. By the time one has died, the one killed previously should respawn and start aggroing.

This will work until the aggro timer resets for them, which means they will not attack. This will end the afk cycle and the player will have to reset the timer by running so that the area of their minimap is out of view. They can then run back to the location and the crabs will be aggressive again.

Drops[edit | edit source]

Drop rates estimated based on 1,170,000 kills from the Old School RuneScape Wiki drop log project, unless otherwise cited.

Weapons[edit | edit source]

Item Quantity Rarity Price High Alch
Iron pickaxe.png: Ammonite Crab drops Iron pickaxe with rarity 5/128 in quantity 1Iron pickaxe15/1284384

Fossilised currency[edit | edit source]

Item Quantity Rarity Price High Alch
Numulite.png: Ammonite Crab drops Numulite with rarity 29/128 in quantity 4Numulite429/12876120
Numulite.png: Ammonite Crab drops Numulite with rarity 8/128 in quantity 2Numulite28/1283860
Numulite.png: Ammonite Crab drops Numulite with rarity 6/128 in quantity 8Numulite86/128152240

Materials[edit | edit source]

Item Quantity Rarity Price High Alch
Volcanic ash.png: Ammonite Crab drops Volcanic ash with rarity 6/128 in quantity 1Volcanic ash16/12894120
Iron ore.png: Ammonite Crab drops Iron ore with rarity 4/128 in quantity 1Iron ore14/1284610
Tin ore.png: Ammonite Crab drops Tin ore with rarity 4/128 in quantity 3Tin ore34/1281143
Opal bolt tips.png: Ammonite Crab drops Opal bolt tips with rarity 2/128 in quantity 5Opal bolt tips52/1283020
Coal.png: Ammonite Crab drops Coal with rarity 2/128 in quantity 2Coal22/12825854
Copper ore.png: Ammonite Crab drops Copper ore with rarity 2/128 in quantity 3Copper ore32/1281413

Oysters and Seaweed[edit | edit source]

Item Quantity Rarity Price High Alch
Oyster.png: Ammonite Crab drops Oyster with rarity 12/128 in quantity 2Oyster212/128194240
Oyster.png: Ammonite Crab drops Oyster with rarity 9/128 in quantity 1Oyster19/12897120
Seaweed.png: Ammonite Crab drops Seaweed with rarity 4/128 in quantity 1Seaweed14/128411
Seaweed.png: Ammonite Crab drops Seaweed with rarity 4/128 in quantity 2Seaweed24/128822
Empty oyster.png: Ammonite Crab drops Empty oyster with rarity 3/128 in quantity 1Empty oyster13/128Not sold3
Seaweed.png: Ammonite Crab drops Seaweed with rarity 2/128 in quantity 5Seaweed52/1282055
Edible seaweed.png: Ammonite Crab drops Edible seaweed with rarity 2/128 in quantity 2Edible seaweed22/128402
Oyster pearl.png: Ammonite Crab drops Oyster pearl with rarity 1/128 in quantity 1Oyster pearl11/1287167
Empty oyster.png: Ammonite Crab drops Empty oyster with rarity 1/128 in quantity 3Empty oyster31/128Not sold9

Other[edit | edit source]

Item Quantity Rarity Price High Alch
Fishing bait.png: Ammonite Crab drops Fishing bait with rarity 2/128 in quantity 10Fishing bait102/1284010
Calcite.png: Ammonite Crab drops Calcite with rarity 1/128 in quantity 1Calcite11/128[d 1]3418
Pyrophosphite.png: Ammonite Crab drops Pyrophosphite with rarity 1/128 in quantity 1Pyrophosphite11/128[d 1]10818
Seaweed spore.png: Ammonite Crab drops Seaweed spore with rarity 1/128 in quantity 2Seaweed spore21/12869624
Casket.png: Ammonite Crab drops Casket with rarity 1/128 in quantity 1Casket11/1281,00230
  1. 1.0 1.1 Calcite and pyrophosphite are always dropped together.

Gem drop table[edit | edit source]

There is a 1/128 chance of rolling the gem drop table.

Item Quantity Rarity Price High Alch
Uncut sapphire.png: Ammonite Crab drops Uncut sapphire with rarity 1/512 in quantity 1Uncut sapphire11/512; 1/260[d 1]47215
Uncut emerald.png: Ammonite Crab drops Uncut emerald with rarity 1/1,024 in quantity 1Uncut emerald11/1,024; 1/520[d 1]74730
Uncut ruby.png: Ammonite Crab drops Uncut ruby with rarity 1/2,048 in quantity 1Uncut ruby11/2,048; 1/1,040[d 1]1,32060
Nature talisman.png: Ammonite Crab drops Nature talisman with rarity 1/5,461.33 in quantity 1Nature talisman11/5,461.33; 1/2,773.33[d 1]7892
Uncut diamond.png: Ammonite Crab drops Uncut diamond with rarity 1/8,192 in quantity 1Uncut diamond11/8,192; 1/4,160[d 1]2,942120
Loop half of key.png: Ammonite Crab drops Loop half of key with rarity 1/16,384 in quantity 1Loop half of key11/16,384; 1/8,320[d 1]9,85560
Tooth half of key.png: Ammonite Crab drops Tooth half of key with rarity 1/16,384 in quantity 1Tooth half of key11/16,384; 1/8,320[d 1]10,05860
Rune javelin.png: Ammonite Crab drops Rune javelin with rarity 1/16,384 in quantity 5Rune javelin51/16,384; 1/8,320[d 1]8851,200
Rune spear.png: Ammonite Crab drops Rune spear with rarity 1/262,144 in quantity 1Rune spear11/262,144; 1/15,600[d 1][d 2]11,85512,480
Shield left half.png: Ammonite Crab drops Shield left half with rarity 1/524,288 in quantity 1Shield left half11/524,288; 1/31,200[d 1][d 2]65,50666,000
Dragon spear.png: Ammonite Crab drops Dragon spear with rarity 1/699,050.67 in quantity 1Dragon spear11/699,050.67; 1/41,600[d 1][d 2]37,46037,440
  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 The drop rate of this item is increased when wearing a Ring of wealth.
  2. 2.0 2.1 2.2 The Rune spear, Shield left half and Dragon spear will only be dropped if Legend's Quest has been started, or else a talisman will be dropped as a replacement.

Tertiary[edit | edit source]

Item Quantity Rarity Price High Alch
Clue scroll (easy).png: Ammonite Crab drops Clue scroll (easy) with rarity 1/128 in quantity 1Clue scroll (easy)11/128Not sold12
Numulite.png: Ammonite Crab drops Numulite with rarity 27/175 in quantity 5-14Numulite5–1427/17595-266150-420
Unidentified small fossil.png: Ammonite Crab drops Unidentified small fossil with rarity 3/350 in quantity 1Unidentified small fossil13/350Not sold60
Unidentified medium fossil.png: Ammonite Crab drops Unidentified medium fossil with rarity 3/700 in quantity 1Unidentified medium fossil13/700Not sold120
Unidentified large fossil.png: Ammonite Crab drops Unidentified large fossil with rarity 3/875 in quantity 1Unidentified large fossil13/875Not sold180
Unidentified rare fossil.png: Ammonite Crab drops Unidentified rare fossil with rarity 3/3,500 in quantity 1Unidentified rare fossil13/3,500Not sold750

Changes[edit | edit source]

Date Changes
12 July 2018
(update | poll)
The drop of seaweed spores was increased from 1 to 2.

Trivia[edit | edit source]

References[edit | edit source]