So you think all those big container ships anchored up off Auckland and Whangarei have got nice clean hulls? Nothing in their "niche" areas.
Sounds like they might be there for a while, plenty of time to spread what they got.
Pretty sure the regional councils are pretending its not a problem and assuring themselves that MPI have got it all under control for them while eagerly awaiting BOOBOO's visit to the Bay.