I'm thinking it's a Nature Reserve. If you click on it in multiple areas (not just Catalina
, the popup seams to include something like the below.
Restricted area - Nature reserve: Highly Migratory Species Protection Area - Driftnet Closure 2
Information: Boundaries are approximate. Boundaries and restrictions are approximate so users are advised to look at the official website for the latest updates , PURPOSE - To protect and preserve highly migratory species, which are species that move throughout large areas of the Pacific and are fished by many nations and gear
types, and to ensure that all take of highly migratory species is sustainable Pacific-wide. , RESTRICTIONS - This area is closed to all fishing
with driftnet gear
from May 1 through August 14. , ALLOWED - Fishing
with other gear and fishing with driftnet gear from August 15 until March 31 is permitted, subject to federal regulations
. , SPECIES OF CONCERN - Highly migratory species , REMOVAL
LIFE IS PROHIBITES - Medium , Overflight or Drones Prohibited - No.