Picked up a nice bluebarred parrotfish off the rocks in the marina yesterday by chance and wondering if anybody has had luck actively targeting them at all?

A few months ago while walking the rocks I noticed a fair few blue shadows over the shallow reefs and up close to the rock walls in the corner of the channel.... I figured they were blue bone and had tried casting crabs and occy at them but wasn't drumming up any interest whatsoever. On another day, it was very glassy and upon a closer look I could see that they were actually parrotfish so quit trying to catch them as I thought they were vegetarian. 

When casting really lightly weighted prawns around some pillars and rock walls yesterday, I picked up a nice fish which was bloody good on the plate also! Prior to landing this fish I also had a really quick run and the leader clean cut, which after catching the parrotfish and looking at the mouth on the thing, suspect this could have been the culprit. 

My question is, has anybody had any success chasing parrotfish on a hook and line or just as an occasional bycatch?