Ammonite Crab

Fossil Rock
Released	7 September 2017 (Update)
Members	Yes
Race	Crab
Location	Fossil Island
Examine	An outcrop embedded with an ammonite fossil.
Advanced data
NPC ID	7800

Ammonite Crab
Released	7 September 2017 (Update)
Members	Yes
Combat level	25
Size	2x2
Examine	Praise Helix!
Combat info
Max hit	1
Aggressive	Yes
Poisonous	No
Attack style	Crush
Attack speed
Respawn time	50 ticks (30 seconds)
Combat stats
Aggressive stats
Defensive stats
Immunities
Poison	Not immune
Venom	Not immune
Advanced data
Monster ID	7799

Loading...

ActiveHidden

Ammonite Crabs can be found on the most coastal areas and the most northern beaches of Fossil Island, as well as in the northern Wyvern Cave.

Locations[edit | edit source]

Location	Levels	Spawns	Map
Mushroom Forest	25	28	Maplink
Fossil Island Volcano	25	4	Maplink
Wyvern Cave - northern cave	25	7	Maplink

Training Combat[edit | edit source]

Ammonite crabs are one of the creatures that are recommended for training of all levels. They are similar to rock and sand crabs as they have virtually no combat stats but have the highest health of all the crabs. Low level players should bring some food.

Like all other crabs, ammonite crabs start off aggressive but will become tolerant of the player after ten minutes. As they must be active in order to be fought, players must reset their aggression timer once they become tolerant.

Drops[edit | edit source]

Drop rates estimated based on 1,170,000 kills from the Drop Rate Project, unless otherwise cited.

The average Ammonite Crab kill is worth 178.

Weapons[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Iron pickaxe	1	5/128	110	84

Fossilised currency[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Numulite	4	29/128	112	120
Numulite	2	8/128	56	60
Numulite	8	6/128	224	240
Numulite	14	6/128	392	420

Materials[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Volcanic ash	1	6/128	75	120
Iron ore	1	4/128	149	10
Tin ore	3	4/128	210	3
Opal bolt tips	5	2/128	385	20
Coal	2	2/128	304	54
Copper ore	3	2/128	210	3

Oysters and Seaweed[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Oyster	2	12/128	114	240
Oyster	1	9/128	57	120
Seaweed	1–2	8/128	23–46	1–2
Empty oyster	1	3/128	Not sold	3
Seaweed	5	2/128	115	5
Edible seaweed	2	2/128	124	2
Oyster pearl	1	1/128	116	67
Empty oyster	3	1/128	Not sold	9

Other[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Nothing	N/A	15/128	N/A	N/A
Fishing bait	10	2/128	40	10
Calcite	1	1/128^{[d 1]}	65	18
Pyrophosphite	1	1/128^{[d 1]}	55	18
Seaweed spore	2	1/128	1,192	24
Casket	1	1/128	959	30

^ ^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
Nothing	N/A	1/256.47; Never^{[d 1]}	N/A	N/A
Uncut sapphire	1	1/512; 1/260^{[d 2]}	354	15
Uncut emerald	1	1/1,024; 1/520^{[d 2]}	550	30
Uncut ruby	1	1/2,048; 1/1,040^{[d 2]}	1,158	60
Chaos talisman	1	1/5,461.33; 1/2,773.33^{[d 2]}^{[d 3]}	154	2
Nature talisman	1	1/5,461.33; 1/2,773.33^{[d 2]}^{[d 3]}	475	2
Uncut diamond	1	1/8,192; 1/4,160^{[d 2]}	2,772	120
Loop half of key	1	1/16,384; 1/8,320^{[d 2]}	10,150	60
Tooth half of key	1	1/16,384; 1/8,320^{[d 2]}	10,149	60
Rune javelin	5	1/16,384; 1/8,320^{[d 2]}	730	1,200
Rune spear	1	1/262,144; 1/15,600^{[d 2]}^{[d 4]}	11,836	12,480
Shield left half	1	1/524,288; 1/31,200^{[d 2]}^{[d 4]}	65,473	66,000
Dragon spear	1	1/699,050.67; 1/41,600^{[d 2]}^{[d 4]}	37,137	37,440

^ The "nothing" drop is removed while wearing a ring of wealth.
^ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 ^2.11 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
^ ^3.0 ^3.1 The talisman dropped depends on where the monster is located: monsters above ground level drop the nature talisman, and monsters below ground level drop the chaos talisman.
^ ^4.0 ^4.1 ^4.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

Tertiary[edit | edit source]

Item	Quantity	Rarity	Price	High Alch
Clue scroll (easy)	1	1/128^{[d 1]}	Not sold	12
Numulite	5–14	27/175	140–392	150–420
Unidentified small fossil	1	3/350	Not sold	60
Unidentified medium fossil	1	3/700	Not sold	120
Unidentified large fossil	1	3/875	Not sold	180
Unidentified rare fossil	1	3/3,500	Not sold	750

^ The easy clue scroll drop rate increases to 1/121 with the completion of the easy combat achievements.

Changes[edit | edit source]

Date	Changes
12 July 2018 (update \| poll)	Ammonite Crabs now drop a maximum of 2 seaweed spores instead of 1.

Trivia[edit | edit source]

The examine text is a reference to the Helix Fossil meme from Twitch Plays Pokémon.

[minerals-1] 1.0 ^1.1 Calcite and pyrophosphite are always dropped together.

[2] The "nothing" drop is removed while wearing a ring of wealth.

[row-3] 2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 ^2.11 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.

[rowt-4] 3.0 ^3.1 The talisman dropped depends on where the monster is located: monsters above ground level drop the nature talisman, and monsters below ground level drop the chaos talisman.

[rowm-5] 4.0 ^4.1 ^4.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

[6] The easy clue scroll drop rate increases to 1/121 with the completion of the easy combat achievements.

[d 1]

[d 1]

[d 2]

[d 3]

[d 4]

[d 1]

Ammonite Crab

Contents

Locations[edit | edit source]

Training Combat[edit | edit source]