piranha in erudin has a faction hit
 

Received a faction hit from 'a giant piranha' that spawns off the docks in Erudin at 805, -277.

http://i.imgur.com/x7xtgXV.png

My classic-fu is weak, but nothing turned up for me while looking for a reason why opal darkbriar cares about my piranha killing.

http://web.archive.org/web/200210280...how&BID=121084

Fixed, pending update