It is very clear to us that the season should open at the same time for everyone. Otherwise, some harvesters have an advantage over others. Fishing area 12 is a large area, and it may seem huge to someone who isn't familiar with the area. Where are the crab concentrated? Where is the resource concentrated? That's something completely different. Every harvester knows those areas and those fishing grounds.
A decision to open the season at different times could start a war between harvesters, and that wouldn't be good. Furthermore, opening the fishery on a set date could put lives at risk. Harvesters will want to start the season and go out fishing even if it's not safe.