Gleason's Gielinor Guide

This article has a Slayer task guide: Crabs.

Information and strategy regarding this Slayer task will be on this page.

NormalBloomedHidden
Swamp Crab

Released		24 May 2018 (Update)
Members		Yes
Combat level		55
Size		1x1
Examine		No one likes crabs...
Combat info
XP bonus		+0%
Max hit		1
Aggressive		Yes
Poisonous		No
Attack style		Crush
Attack speed		4 ticks (2.4 seconds)
Respawn time		50 ticks (30 seconds)
Slayer info
Slayer level		None
Slayer XP		75 xp
Category		Crabs
Assigned by
Combat stats

75	1	1	50	50	1
Aggressive stats

+0	+0	+0	+0	+0	+0
Melee defence

+100		+100		+100
Magic defence

+100			35% weakness
Ranged defence

-55		-55		-55
Immunities
Poison		0% resistance
Venom		0% resistance
Cannons		Not immune
Thralls		Not immune
Open in DPS calculator
Advanced data
Monster ID		8297
Link		MOID

Swamp Crabs are aggressive monsters that disguise themselves as swampy logs. When a player approaches them, they will attack in a fashion that is identical to Rock Crabs. However, unlike other crabs, the aggression range for Swamp Crabs is only 1 square wide, and they are notably more resistant to melee and magic. They can be found in multi-combat areas directly south of Port Phasmatys and along the path leading from Port Phasmatys to Slepe. It is recommended that lower-level players wanting to kill these stay near Port Phasmatys, as the path traverses through the Haunted Woods and players may encounter Feral Vampyres and Leeches.

Like all other crabs, swamp 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. After aggression is lost the crabs can only be examined as a Swampy log, giving the message "A bit of decaying wood".

If a player casts bloom while fighting a Swamp Crab, then its "shell" will grow three Mort Myre Fungi, which will be dropped once it is killed. A good tactic to obtain additional fungi is to lure a Swamp Crab next to a Rotting log, which will also have a chance of spawning some fungi after casting bloom.

Unlike other crabs, Swamp Crabs boast higher melee and magic defence, so it is generally not recommended to use these attack styles. Rather, due to their significantly reduced ranged defence, they are ideal for low-level to mid-level Ranged training.

Locations

Location	Levels	Members	Spawns	Map
Haunted Woods	55		24	Show map
Slepe	55		6	Show map

Drops

Drop rates are estimated based on 266,368 samples from the Drop Rate Project, unless otherwise cited.

100%

	Item	Quantity	Rarity	Price	High Alch
	Mort myre fungus	3	Always^{[d 1]}	711	0

^ Only if the Bloom spell is used while being attacked by a Swamp Crab.

Weapons

Item	Quantity	Rarity	Price	High Alch
Bronze pickaxe	1	12/128	98	0
Bronze axe	1	6/128	105	9
Iron axe	1	5/128	121	33

Materials

Item	Quantity	Rarity	Price	High Alch
Logs	8	4/128	192	16
Oak logs	4	2/128	160	48
Copper ore	4	2/128	72	4
Tin ore	4	4/128	76	4
Iron ore	2	2/128	146	20
Coal	2	2/128	284	54
Willow logs	2	1/128	48	48
Mort myre fungus	1	2/128	237	0
Yew logs	1	1/128	105	96

Coins

Item	Quantity	Rarity	Price	High Alch
Coins	4–10	19/128	4–10	4–10
Coins	42	8/128	42	42
Coins	120	6/128	120	120

Other

Item	Quantity	Rarity	Price	High Alch
Seaweed	2–8	4/128	10–40	2–8
Knife	4	29/128	308	12
Chisel	1	3/128	76	0
Fishing bait	12	2/128	60	12
Edible seaweed	3	2/128	96	3
Bark	1–2	9/128	50–100	0
Spinach roll	1	1/128	537	0
Casket	1	1/128	698	30

Gem drop table

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]}	206	15
Uncut emerald	1	1/1,024; 1/520^{[d 2]}	416	30
Uncut ruby	1	1/2,048; 1/1,040^{[d 2]}	1,011	60
Nature talisman	1	1/5,461.33; 1/2,773.33^{[d 2]}	159	2
Uncut diamond	1	1/8,192; 1/4,160^{[d 2]}	2,455	120
Rune javelin	5	1/16,384; 1/8,320^{[d 2]}	650	1,200
Loop half of key	1	1/16,384; 1/8,320^{[d 2]}	9,737	60
Tooth half of key	1	1/16,384; 1/8,320^{[d 2]}	9,917	60
Rune spear	1	1/262,144; 1/15,600^{[d 2]}^{[d 3]}	11,769	12,480
Shield left half	1	1/524,288; 1/31,200^{[d 2]}^{[d 3]}	65,429	66,000
Dragon spear	1	1/699,050.67; 1/41,600^{[d 2]}^{[d 3]}	37,749	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 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
^ ^3.0 ^3.1 ^3.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

Tertiary

	Item	Quantity	Rarity	Price	High Alch
	Clue scroll (easy)	1	1/96^{[d 1]}^{[d 2]}^[1]	Not sold	12

^ The easy clue scroll drop rate increases to 1/91 after unlocking the easy Combat Achievements rewards tier.
^ Clue scrolls will drop as scroll boxes after the completion of X Marks the Spot.

Changes

Date	Changes
25 June 2025 (Update)	Swamp crabs now have a 35% elemental weakness to earth spells.
26 March 2025 (Update \| poll)	Crabs can now be assigned as a Slayer task by Mazchna, Vannaka, and Chaeldar.

References

^ 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."