This mob spawns at -102, -479, +1.75 at the Swamp of No Hope gate, in the southeast corner.
Findable (via Ctrl-F): No
You say, 'Hail, Trooper Nishnish'
Trooper Nishnish says, 'Hail, citizen! Keep clear of the waterways which run through this grand city. For swimming they are not. Many times have playful broodlings fallen prey to the sharp teeth of barracudas.'