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
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 1 Common 89 Iron pickaxe 1 Common 162 Bronze axe 1 Uncommon 53
Runes and talisman
Item Quantity Rarity GE market price Fire rune 7 Common 35 Nature rune 4 Uncommon 824 Chaos rune 1 Rare 99
Item Quantity Rarity GE market price Coins 4–413 Common Not sold Oyster 1–2 Common 57–114 Seaweed 1–5 Common 63–315 Oyster pearl 1 Common 66 Empty oyster 1 Common Not sold Spinach roll 1 Uncommon Not sold Knife 1 Uncommon 35 Opal bolt tips 5 Uncommon 20 Iron ore 1 Uncommon 94 Coal 2 Uncommon 324 Copper ore 3 Uncommon 96 Tin ore 3 Uncommon 99 Fishing bait 1–10 Uncommon 4–40 Edible seaweed 2 Rare 84 Jade bolt tips 1 Rare 3 Limpwurt root 1 Rare 898 Grimy ranarr weed 1 Rare 7,199 Grimy avantoe 1 Rare 1,457 Tarromin seed 1 Rare 4 Ranarr seed 1 Rare 42,424 Clue scroll (easy) 1 Rare Not sold Casket 1 Rare 852
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 1 Rare 661 Uncut emerald 1 Rare 872 Uncut ruby 1 Rare 1,509 Cosmic talisman 1 Very rare 712 Uncut diamond 1 Very rare 2,838 Rune javelin 5 Very rare 805 Loop half of key 1 Very rare 9,984 Tooth half of key 1 Very rare 11,768 Rune spear 1 Very rare 12,103 Shield left half 1 Very rare 65,634 Dragon spear 1 Very rare 37,414