Jersey is a self ruling crown dependency, and the distance to Guernsey is approximately twenty seven miles. I know little of professional fishing practice, however it would seem reasonable for Jersey to also apply for a twelve mile fishing zone. That is when whoever is politically responsible wakes up.
Parts of an article from BBC.
The Bailiwick of Guernsey can legislate fishing within 12 miles of the islands after the UK Government signed a Fisheries Management Agreement (FMA).
It sets out the details of how the Bailiwick intends to licence and regulate fishing activities within the 3-12 nautical mile limit.
The signatories were the States of Alderney, the Sark Chief Pleas, the States of Guernsey and the UK Department for Environment, Food and Rural Affairs (DEFRA), Marine Scotland, the Welsh Government and the Department of Agriculture and Rural Development Northern Ireland.
http://www.bbc.co.uk/news/world-europe-guernsey-15573809BB