Giant Rock Crab

From Old School RuneScape Wiki
Jump to: navigation, search

Giant rock crabs are massive versions of the weaker Rock crab. They lie in wait for prey, disguised as large boulders. When approached, they attack, unless they have become tolerant, in which case they remain as "boulders" - attempting to cast a spell on them gives the message "You can't attack this NPC."

Giant rock crabs are only initially aggressive if they are approached while dormant. Once they are moving and the targeted player is out of range, they stop being aggressive and will ignore players that don't attack them. They eventually become dormant boulders again after a while if they are not attacked.

Locations[edit | edit source]

Location Levels Members Spawns Map
Waterbirth Island Dungeon [1]137Member icon.png3Maplink
  1. In Waterbirth Island Dungeon a partner or a pet rock is required to open the door

Strategy[edit | edit source]

The giant rock crab is one of few monsters in RuneScape that will retreat from battle when they become critically wounded. This can be troublesome, as they are found in a single-way combat area. This can be prevented by attacking them while their back is turned to a nearby wall, so that they move away from the player and back up into the wall. If they move too far away, the player will follow them and risk being attacked by another rock crab. There are several protruding sections of the walls in the area that can be used as safespots which are ideal as the crabs' main weakness is magic.

If one wishes to use melee, the crabs can be killed deeper into the cave where there are several spawns in multi-way combat. These crabs will still drop their unique items on the drop table.

Drops[edit | edit source]

Drop rates estimated based on 1,715 kills from the Drop Rate Project, unless otherwise cited.

100%[edit | edit source]

Item Quantity Rarity Price High Alch
Bones.png: Giant Rock Crab drops Bones with rarity Always in quantity 1Bones1Always910

Weapons and armour[edit | edit source]

Item Quantity Rarity Price High Alch
Steel platebody.png: Giant Rock Crab drops Steel platebody with rarity 5/128 in quantity 1Steel platebody15/1288421,200
Black claws.png: Giant Rock Crab drops Black claws with rarity 5/128 in quantity 1Black claws15/128557216
Black platebody.png: Giant Rock Crab drops Black platebody with rarity 5/128 in quantity 1Black platebody15/1284,0352,304
Mithril axe.png: Giant Rock Crab drops Mithril axe with rarity 10/128 in quantity 1Mithril axe110/12873312
Rock-shell gloves.png: Giant Rock Crab drops Rock-shell gloves with rarity 2/128 in quantity 1Rock-shell gloves12/128723390
Rock-shell boots.png: Giant Rock Crab drops Rock-shell boots with rarity 2/128 in quantity 1Rock-shell boots12/128315390
Black warhammer.png: Giant Rock Crab drops Black warhammer with rarity 5/128 in quantity 1Black warhammer15/128378588
Adamant longsword.png: Giant Rock Crab drops Adamant longsword with rarity 5/128 in quantity 1Adamant longsword15/1281,5761,920

Runes[edit | edit source]

Item Quantity Rarity Price High Alch
Water rune.png: Giant Rock Crab drops Water rune with rarity 10/128 in quantity 1-40Water rune1–4010/1285–2002–80
Earth rune.png: Giant Rock Crab drops Earth rune with rarity 10/128 in quantity 1-40Earth rune1–4010/1285–2002–80

Herbs[edit | edit source]

There is a 8/128 chance of rolling the herb drop table.

Item Quantity Rarity Price High Alch
Grimy guam leaf.png: Giant Rock Crab drops Grimy guam leaf with rarity 1/64 in quantity 1Grimy guam leaf11/64397
Grimy marrentill.png: Giant Rock Crab drops Grimy marrentill with rarity 1/85.3 in quantity 1Grimy marrentill11/85.3198
Grimy tarromin.png: Giant Rock Crab drops Grimy tarromin with rarity 1/113.8 in quantity 1Grimy tarromin11/113.81109
Grimy harralander.png: Giant Rock Crab drops Grimy harralander with rarity 1/146.3 in quantity 1Grimy harralander11/146.37079
Grimy ranarr weed.png: Giant Rock Crab drops Grimy ranarr weed with rarity 1/186.2 in quantity 1Grimy ranarr weed11/186.27,35718
Grimy irit leaf.png: Giant Rock Crab drops Grimy irit leaf with rarity 1/256 in quantity 1Grimy irit leaf11/25664810
Grimy avantoe.png: Giant Rock Crab drops Grimy avantoe with rarity 1/341.3 in quantity 1Grimy avantoe11/341.31,39510
Grimy kwuarm.png: Giant Rock Crab drops Grimy kwuarm with rarity 1/409.6 in quantity 1Grimy kwuarm11/409.61,37712
Grimy cadantine.png: Giant Rock Crab drops Grimy cadantine with rarity 1/512 in quantity 1Grimy cadantine11/5121,35013
Grimy lantadyme.png: Giant Rock Crab drops Grimy lantadyme with rarity 1/682.7 in quantity 1Grimy lantadyme11/682.71,18013
Grimy dwarf weed.png: Giant Rock Crab drops Grimy dwarf weed with rarity 1/682.7 in quantity 1Grimy dwarf weed11/682.771214

Seeds[edit | edit source]

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

Item Quantity Rarity Price High Alch
Toadflax seed.png: Giant Rock Crab drops Toadflax seed with rarity 1/642.7 in quantity 1Toadflax seed11/642.71,7936
Irit seed.png: Giant Rock Crab drops Irit seed with rarity 1/944 in quantity 1Irit seed11/944353
Belladonna seed.png: Giant Rock Crab drops Belladonna seed with rarity 1/974.5 in quantity 1Belladonna seed11/974.579106
Poison ivy seed.png: Giant Rock Crab drops Poison ivy seed with rarity 1/1,373.1 in quantity 1Poison ivy seed11/1,373.11399
Avantoe seed.png: Giant Rock Crab drops Avantoe seed with rarity 1/1,373.1 in quantity 1Avantoe seed11/1,373.13224
Cactus seed.png: Giant Rock Crab drops Cactus seed with rarity 1/1,438.5 in quantity 1Cactus seed11/1,438.53959
Potato cactus seed.png: Giant Rock Crab drops Potato cactus seed with rarity 1/2,013.9 in quantity 1Potato cactus seed11/2,013.9984
Kwuarm seed.png: Giant Rock Crab drops Kwuarm seed with rarity 1/2,013.9 in quantity 1Kwuarm seed11/2,013.91916
Snapdragon seed.png: Giant Rock Crab drops Snapdragon seed with rarity 1/3,020.8 in quantity 1Snapdragon seed11/3,020.854,20836
Cadantine seed.png: Giant Rock Crab drops Cadantine seed with rarity 1/4,315.4 in quantity 1Cadantine seed11/4,315.45644
Lantadyme seed.png: Giant Rock Crab drops Lantadyme seed with rarity 1/6,041.6 in quantity 1Lantadyme seed11/6,041.64225
Snape grass seed.png: Giant Rock Crab drops Snape grass seed with rarity 1/7,552 in quantity 3Snape grass seed31/7,5527,323168
Dwarf weed seed.png: Giant Rock Crab drops Dwarf weed seed with rarity 1/10,069.3 in quantity 1Dwarf weed seed11/10,069.32153
Torstol seed.png: Giant Rock Crab drops Torstol seed with rarity 1/15,104 in quantity 1Torstol seed11/15,10449,36042

Talismans[edit | edit source]

There is a 10/128 chance of rolling the talisman drop table.

Item Quantity Rarity Price High Alch
Air talisman.png: Giant Rock Crab drops Air talisman with rarity 1/89.6 in quantity 1Air talisman11/89.6722
Body talisman.png: Giant Rock Crab drops Body talisman with rarity 1/89.6 in quantity 1Body talisman11/89.61,3032
Earth talisman.png: Giant Rock Crab drops Earth talisman with rarity 1/89.6 in quantity 1Earth talisman11/89.65172
Fire talisman.png: Giant Rock Crab drops Fire talisman with rarity 1/89.6 in quantity 1Fire talisman11/89.65,5652
Mind talisman.png: Giant Rock Crab drops Mind talisman with rarity 1/89.6 in quantity 1Mind talisman11/89.63,7752
Water talisman.png: Giant Rock Crab drops Water talisman with rarity 1/89.6 in quantity 1Water talisman11/89.69132
Cosmic talisman.png: Giant Rock Crab drops Cosmic talisman with rarity 1/224 in quantity 1Cosmic talisman11/2248392
Chaos talisman.png: Giant Rock Crab drops Chaos talisman with rarity 1/298.7 in quantity 1Chaos talisman11/298.75782
Nature talisman.png: Giant Rock Crab drops Nature talisman with rarity 1/298.7 in quantity 1Nature talisman11/298.79272

Other[edit | edit source]

Item Quantity Rarity Price High Alch
Coins_100.png: Giant Rock Crab drops Coins with rarity 10/128 in quantity 1-140Coins1–14010/1281–1401–140
Raw lobster.png: Giant Rock Crab drops Raw lobster with rarity 10/128 in quantity 1Raw lobster110/12811242
Raw bass.png: Giant Rock Crab drops Raw bass with rarity 10/128 in quantity 1Raw bass110/1281324
Tinderbox.png: Giant Rock Crab drops Tinderbox with rarity 10/128 in quantity 1Tinderbox110/128850
Casket.png: Giant Rock Crab drops Casket with rarity 2/128 in quantity 1Casket12/12875130
Rock-shell splinter.png: Giant Rock Crab drops Rock-shell splinter with rarity 2/128 in quantity 1Rock-shell splinter12/12823,08536
Rock-shell chunk.png: Giant Rock Crab drops Rock-shell chunk with rarity 2/128 in quantity 1Rock-shell chunk12/12812,23136
Rock-shell shard.png: Giant Rock Crab drops Rock-shell shard with rarity 2/128 in quantity 1Rock-shell shard12/12820,56336

Gem drop table[edit | edit source]

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

Item Quantity Rarity Price High Alch
This does not exist.NothingN/A1/256.47; Never[d 1]N/AN/A
Uncut sapphire.png: Giant Rock Crab drops Uncut sapphire with rarity 1/512 in quantity 1Uncut sapphire11/512; 1/260[d 2]31815
Uncut emerald.png: Giant Rock Crab drops Uncut emerald with rarity 1/1,024 in quantity 1Uncut emerald11/1,024; 1/520[d 2]50630
Uncut ruby.png: Giant Rock Crab drops Uncut ruby with rarity 1/2,048 in quantity 1Uncut ruby11/2,048; 1/1,040[d 2]1,14760
Nature talisman.png: Giant Rock Crab drops Nature talisman with rarity 1/5,461.33 in quantity 1Nature talisman11/5,461.33; 1/2,773.33[d 2]9272
Uncut diamond.png: Giant Rock Crab drops Uncut diamond with rarity 1/8,192 in quantity 1Uncut diamond11/8,192; 1/4,160[d 2]2,627120
Loop half of key.png: Giant Rock Crab drops Loop half of key with rarity 1/16,384 in quantity 1Loop half of key11/16,384; 1/8,320[d 2]10,07560
Tooth half of key.png: Giant Rock Crab drops Tooth half of key with rarity 1/16,384 in quantity 1Tooth half of key11/16,384; 1/8,320[d 2]10,01360
Rune javelin.png: Giant Rock Crab drops Rune javelin with rarity 1/16,384 in quantity 5Rune javelin51/16,384; 1/8,320[d 2]8751,200
Rune spear.png: Giant Rock Crab drops Rune spear with rarity 1/262,144 in quantity 1Rune spear11/262,144; 1/15,600[d 2][d 3]11,84312,480
Shield left half.png: Giant Rock Crab drops Shield left half with rarity 1/524,288 in quantity 1Shield left half11/524,288; 1/31,200[d 2][d 3]65,20366,000
Dragon spear.png: Giant Rock Crab drops Dragon spear with rarity 1/699,050.67 in quantity 1Dragon spear11/699,050.67; 1/41,600[d 2][d 3]37,31337,440
  1. The "nothing" drop is removed while wearing a ring of wealth.
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
  3. 3.0 3.1 3.2 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 (medium).png: Giant Rock Crab drops Clue scroll (medium) with rarity 1/128 in quantity 1Clue scroll (medium)11/128[d 1][1]Not sold12
  1. The medium clue scroll drop rate increases to 1/121 with the completion of the medium combat achievements.

References[edit | edit source]

  1. Jagex. Mod Tide's Twitter account. 24 May 2019. (Archived from the original on 24 May 2019.) Mod Tide: "I know its been a while since the clue expansion but here is the information on clue scroll drop rates and loot chances! If anything changes I will keep you posted."