Mogres (also called Mud ogre) are Slayer monsters that can be killed as part of a Slayer task or when the player has not been set them as an assignment. They may only be killed by players who have completed the Mogre miniquest and who have level 32 Slayer. Mogres attack when disturbed by the player, who must lure them using fishing explosives. Their name appears to be a mixture of "Marine" and "Ogre". Mogres may be killed by players searching for their unique drops of Flippers and Mudskipper hats.
The Mogres are most likely descendants of Bandos' army, which he used during the God Wars. As the Jogres were Ogres bred in tropical areas, it is likely that the Mogres were bred underwater, or modified to be able to breathe underwater. It is possible that their sub-race was created to fight some underwater enemy of Bandos.
Firstly players must lure a Mogre by using Fishing explosives, which can be purchased from any Slayer Master, on one of the three Ominous fishing spots at Mudskipper point. Players may also use Super Fishing Explosives, which will deal 150 life points of damage to the Mogre in addition to luring it out of the water, if they have completed the Kennith's Concerns quest. Players must leave at least one space between themselves and the Ominous fishing spot in order to use Fishing explosives on it; if they do not then their character will remind them that they are standing too close to the spot to use the explosives. A Mogre will appear, walk towards the player and start attacking them. Only one Mogre may be lured at a time.
Mogres are weak for their level and deal little damage; therefore they should present no challenge to kill for players with medium-high combat levels. Players with low combat levels could use the Safe spots around Mudskipper point to range or mage the Mogres without taking damage. Players could also heal themselves using the raw fish dropped by the Mogres by cooking it, logs are another drop of the Mogres, or consuming raw through the Swallow whole special move of a Bunyip.
Mogres have various sayings when they come out of the water. These include : "Da boom-boom kill all da fishies!", "I smack you good!", "Smash stupid human!", "Tasty human!", "Human hit me on the head!", "I get you!", "Human scare all da fishies!" and a few others.
If players stand too near from the Ominous fishing spot, they'll receive an interface showing, "If this thing explodes, I think I should stand a liiiiitle further away...".