Rock leeches are found at the bottom of Adamant Canyon. Getting to them requires two separate 30 meter climbs.
There is no hunting contract for Rock Leeches and they drop no loot. Butchering them provides Rock leech hides which are used in high-end crafted items.
Fighting Rock LeechesEdit
Rock leeches are slightly more dangerous to fight than a Lobstrosity yet provide XP comparable to an Arachno. Their attacks are slow and inaccurate but deal fairly heavy slashing damage when they hit. They appear to be slightly resistant to slashing damage.