Rock Slugs and How to Kill if you get them as a slayer task

How to Kill them when you get them as a slayer task.Edit

Well all you need is some rock salt which is supplied at any slayer master for roughly 30 coins each

Is killing them profitible?Edit

Well at this time yes,lots of ores drop there so you may need a few trips to make some serious money but overall you can make some decent money if you're earning money via slayer or just PvM.