Rock Crab

Beta
 * Not to be confused with Granite crabs and the Giant Rock Crabs.

Rock Crabs are aggressive monsters that look like harmless rocks while they are disguised, but when unsuspecting passers walk by, they attack; however, once their target leaves the nearby area, they are no longer aggressive. It should be noted that, unlike most other enemies and NPCs, rock crabs are not marked with yellow dots on the minimap; this is probably due to the fact that the crabs' appearance camouflages them as rocks. Players can tell if a rock is a crab or not by looking at the rock's shape, Rock crabs are tall oval shaped, but normal rocks in their area are mostly in large clusters of shattered pieces. It should also be noted that, as with most aggressive monsters, rock crabs will stop attacking a player if they have not left the surrounding area in a considerable amount of time (roughly between ten and twenty-five minutes). To fix this, simply run out of the surrounding area (to be sure, run halfway to the entrance to the village of Rellekka or simply enter and exit the entrance to Keldagrim) and run back, at which point the rock crabs will once more be aggressive. As they are "dormant" until "awoken" by a passing player, rock crabs cannot be attacked until they are made aggressive once more.

In the quest Fur 'n' Seek, its carcass must be collected and cleaned for the Odd Old Man.

For low defence levelled players, it is recommended that if you are killing these creatures for long periods of time, you bring some food just in case as there are no nearby banks. It is also recommended that you bring a Camelot teleport/teletab to bank for more food as it is near the area of the rock crabs, or home teleport to Seers' Village. You could also use the bank in Keldagrim. The entrance is right between the statues to the east of the Rock Crabs.

Training
Rock Crabs are commonly trained upon due to their high exp rewards; and occasional valuable drops, low combat level and defence. Most places where Rock Crabs reside are heavily crowded, so, if you plan to train on them, it is best to choose an activity world. However, during the time when Hati is active, low levels are advised to avoid the Rock Crab area east of Rellekka as anti-botters will bring Hati to the Rock Crabs, making it impossible to train. Players also commonly set up dwarf multicannons among rock crabs. It would take a total of 65,173 Rock Crabs to get a combat skill from level 1 to level 99. Doing so would also get your Constitution level to 87 if you started from scratch (unless you are using a cannon or magic).

The area has recently become less crowded due to "Bot nuking day". Many worlds are empty in this area, making it a lot easier to train here. (Bot nuking day was a while ago, and is no longer relevant, for the bots are back up)

Locations

 * North of Rellekka, west of the entrance to Keldagrim east and west of the town on the beach (may be overcrowded)(can not use summoning without multi-combat)
 * Waterbirth Island - There is no multi-combat.


 * Brine Rat Cavern

Herbs and seeds

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Weapons

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Runes and Talisman

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Others

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Classification
These animals are most likely, as the name suggests, a form of crab, noting that the rock crabs always walk sideways (and attack by smashing their sides into the player). It is possible that they may belong to a different animal phylum, such as insects, and only look like crabs, although this is not very likely. The animals are always spotted near water; while the graphics of RuneScape do not show them immersing themselves in water, it can be safely assumed that they would hypothetically do so. In the quest Fur n' Seek, the rock crab's carcass that is collected by the player consists of only a shell and other, not easily visible remnants.

Trivia

 * The examine for rock crabs is: "No-one likes crabs." This could be a reference to the parasite or a reference to grumpy people, as they are sometimes called "crabs", or alternatively a reference to pubic lice, as they are too sometimes called "crabs."
 * The Fremennik used to eat them, as mentioned in the lore Twice Burnt, although players cannot cook them.