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 95 Iron pickaxe 1 Common 29 Bronze axe 1 Uncommon 66
Runes and talisman
Item Quantity Rarity GE market price Fire rune 7 Common 42 Nature rune 4 Uncommon 1,172 Chaos rune 1 Rare 91
Item Quantity Rarity GE market price Coins 4–413 Common Not sold Oyster 1–2 Common 91–182 Seaweed 1–5 Common 42–210 Oyster pearl 1 Common 84 Empty oyster 1 Common Not sold Spinach roll 1 Uncommon Not sold Knife 1 Uncommon 104 Opal bolt tips 5 Uncommon 35 Iron ore 1 Uncommon 61 Coal 2 Uncommon 320 Copper ore 3 Uncommon 126 Tin ore 3 Uncommon 90 Fishing bait 1–10 Uncommon 4–40 Edible seaweed 2 Rare 82 Jade bolt tips 1 Rare 3 Limpwurt root 1 Rare 941 Grimy ranarr weed 1 Rare 10,101 Grimy avantoe 1 Rare 1,791 Tarromin seed 1 Rare 17 Ranarr seed 1 Rare 69,282 Clue scroll (easy) 1 Rare Not sold Casket 1 Rare 557
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 452 Uncut emerald 1 Rare 690 Uncut ruby 1 Rare 1,335 Cosmic talisman 1 Very rare 724 Uncut diamond 1 Very rare 2,780 Rune javelin 5 Very rare 605 Loop half of key 1 Very rare 10,022 Tooth half of key 1 Very rare 10,025 Rune spear 1 Very rare 11,951 Shield left half 1 Very rare 65,359 Dragon spear 1 Very rare 37,763