Wallasalkis are creatures resembling a Walrus found inside the Waterbirth Island Dungeon. Level 91 Wallaski can be found in the middle path on the first level of the dungeon, and level 79 versions can be found deeper in the dungeon, guarding the way to the Dagannoth Kings They attack with Magic by casting Water Wave at the player. They may start to run away from the attacking player, similar to giant rock crabs, after being damaged to below half health.
A good spot to kill them is at the narrow pathway just before the barricades at the central room in sublevel 1. After they develop their tolerance toward a player he or she may kill as many as desired and use the narrow pathway and other nearby wall structures to trap themselves from moving out of the tolerance area.
Wallasalkis drops include the raw materials required for skeletal armour. They also drop various runes, similar to most magical monsters.
These are potentially a good source of blue charms. They also drop all sorts of herb seeds, herbs, and assorted runes which can also make them a good source of money.
Wallasalki can be good experience for high level ranged training. They have high life points, moderate melee defence, and a weakness to arrows. They are never crowded due to very few players knowing that they are a good source of charms, experience, and money. They are arguably one of the least known NPC's in RuneScape.
If training melee, it is advised to bring prayer potions for protect/deflect magic or Soul Split. If you are using prayer, try to find a good armour setup so that you have high melee attack bonus, and a high prayer bonus, but be especially careful of your health since large amounts of Wallasalkis will be attacking you at once. If using melee it is advised to use a two-handed weapon for use of Hurricane and Quake, which will hurt multiple Wallasalkis at once. It should be noted that good xp rates are only obtained while they are aggressive.
This is a great (and one of the few) ways to use a cannon for experience and to reduce its operating cost at the same time.
The best place to use a dwarf multicannon would be right after using the ladder to go down from level 1. There are only 3 Wallasalkis here, and they are usually not targeted. No other monsters will interrupt your training.
For a while after the release of the Evolution of Combat, these monsters had a weakness to melee (slash) despite the fact that they used magic. A hidden update changed their weakness to arrows and increased their combat level and life points.