Giant rock crab

Giant Rock Crabs are massive versions of the weaker Rock crab. They lie in wait for prey, disguised as large boulders. When neared, they attack.

Locations

 * In Waterbirth Island Dungeon (requires a partner to access);




 * In the Chaos Tunnels (The middle south rift just east of Mage of Zamorak(Abyss) leads directly to them). Recommended when not having a companion.



Strategy
Giant Rock Crabs are very strong and extremely resistant to Melee and Ranged attacks, and thus are only effectively killed using Magic. However, Verac's armour is quite effective with its unique set effect, which can hit through the tough rock-hard armour, and also has a prayer bonus allowing the player to use Protect from melee for longer than usual. This method is advised for those with a low Magic level but high melee combat levels. Their ability to drop 10 charms at once makes them an excellent way to gather the charms necessary to train Summoning. This monster drops the most amount of charms in RuneScape.

Another way to easily kill them is to use Black Salamander or any other salamander. They hit higher than Fire bolt which makes them slightly more cost effective. Combined with the healing effect of a Bunyip can make many kills per trip to obtain summoning charms.

Giant rock crabs do have a very high defence, but a relatively low attack/strength. If attacked in the chaos dungeons they will walk off and stop attacking you after a minute or two.

100% drop

 * Bones

Runes

 * 1,8,16, or 24 Water runes
 * 8,16, or 24 Earth runes
 * Nature talisman
 * Air talisman
 * Mind talisman
 * Fire talisman
 * Cosmic talisman
 * Body talisman
 * Water talisman

Weapons and Armour

 * Steel platebody
 * Black claws
 * Black warhammer
 * Black platebody
 * Mithril axe
 * Adamant longsword
 * Adamant warhammer
 * Rockshell gloves
 * Rockshell boots
 * Rock-shell splinter
 * Rock-shell chunk
 * Rock-shell shard

Charms

 * 10 Gold charms
 * 10 Green charms
 * 10 Crimson charms
 * 10 Blue charms

Seeds

 * Poison ivy seed
 * Herb seed

Other

 * 27 or 137 Coins
 * Uncut gems
 * Herb
 * Raw lobster
 * Raw bass
 * Casket (very rare)
 * Tinderbox
 * Level 2 Clue scroll
 * Clean irit