Hidden Exposed

A player in combat with multiple rock crabs.

​Rock Crabs are aggressive monsters that look like harmless rocks while disguised, but attack when walked by. Unlike most other enemies and NPCs, Rock Crabs are not marked with yellow dots on the player's minimap; this is probably due to the crabs' appearance, which camouflages them as rocks.

Players can tell if a rock is a Rock Crab by looking at the rock's shape; Rock Crabs are tall oval shaped while normal rocks in their area are mostly in large clusters of shattered pieces. Another way to tell is by right clicking on them. If the text colour is yellow, it is a Rock Crab. If the text is blue, it is just a prop.

Rock Crabs become docile if the player has not left the surrounding area in a certain amount of time (roughly between ten and twenty-five minutes). To make the crabs aggressive again, exit the surrounding area (halfway to the entrance to the village in Rellekka, or by entering and exiting the entrance to Keldagrim) and enter again. You can also find one Rock Crab that will be aggressive, kill it then you can continue killing other crabs. As they are "dormant" until "awoken" by a passing player, rock crabs cannot be attacked until they are made aggressive once more.

Rock Crabs are excellent for training at all combat levels due to their low Defence and high Hitpoints, though low level players should consider bringing food. Rock Crabs used to be a popular melee training monster until the release of Sand Crabs, and the subsequent release of Ammonite Crabs, which are now more preferred options for training.


Rellekka Rock Crabs

The spot to avoid cannon fire in Rellekka.

CAUTION: Dwarf multicannons may be used here, unlike with the other types of crabs commonly used for training, This makes training for other players difficult. There is, however, a way to avoid the cannon's fire. If a player moves to the west-most part of the multi-combat zone, most cannon fire can be avoided. There are three rock crab spawns near this location, which makes it a decent spot. Although the cannon's fire can be avoided, it is best to switch to another world when faced with overcrowding.



Item Quantity Rarity GE market price
Bronze pickaxe.png Bronze pickaxe 1 Common 67
Iron pickaxe.png Iron pickaxe 1 Common 24
Bronze axe.png Bronze axe 1 Uncommon 13

Runes and talisman

Item Quantity Rarity GE market price
Fire rune.png Fire rune 7 Common 35
Nature rune.png Nature rune 4 Uncommon 868
Chaos rune.png Chaos rune 1 Rare 89


Item Quantity Rarity GE market price
Coins 250.png Coins 4–413 Common Not sold
Oyster.png Oyster 1–2 Common 86–172
Seaweed.png Seaweed 1–5 Common 45–225
Oyster pearl.png Oyster pearl 1 Common 108
Empty oyster.png Empty oyster 1 Common Not sold
Spinach roll.png Spinach roll 1 Uncommon Not sold
Knife.png Knife 1 Uncommon 98
Opal bolt tips 5.png Opal bolt tips 5 Uncommon 40
Iron ore.png Iron ore 1 Uncommon 173
Coal.png Coal 2 Uncommon 324
Copper ore.png Copper ore 3 Uncommon 285
Tin ore.png Tin ore 3 Uncommon 285
Fishing bait.png Fishing bait 1–10 Uncommon 4–40
Edible seaweed.png Edible seaweed 2 Rare 34
Jade bolt tips 5.png Jade bolt tips 1 Rare 3
Limpwurt root.png Limpwurt root 1 Rare 918
Grimy ranarr weed.png Grimy ranarr weed 1 Rare 7,640
Grimy avantoe.png Grimy avantoe 1 Rare 1,814
Herb seed 5.png Tarromin seed 1 Rare 10
Herb seed 5.png Ranarr seed 1 Rare 45,466
Clue scroll (easy).png Clue scroll (easy) 1 Rare Not sold
Casket.png Casket 1 Rare 731

Gem drop table

In addition to the drops above, this monster has access to the gem drop table.

Show/hide gem drop table
Item Quantity Rarity GE market price
Uncut sapphire.png Uncut sapphire 1 Rare 455
Uncut emerald.png Uncut emerald 1 Rare 679
Uncut ruby.png Uncut ruby 1 Rare 1,249
Cosmic talisman.png Cosmic talisman 1 Very rare 784
Uncut diamond.png Uncut diamond 1 Very rare 2,627
Rune javelin.png Rune javelin 5 Very rare 875
Loop half of key.png Loop half of key 1 Very rare 10,307
Tooth half of key.png Tooth half of key 1 Very rare 10,840
Rune spear.png Rune spear 1 Very rare 11,933
Shield left half.png Shield left half 1 Very rare 65,697
Dragon spear.png Dragon spear 1 Very rare 37,226

See also

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