UpSea and UpBeach
-  No beach but an underwater domed city/sector (add a transit system stop?).  Think aquaria/Sea World.
 
-  Underwater kelp farms, with the seaweed arranged in neat rows and tended by submarine droids (Fresh seagreens and proteins from the sea!)
 
-  Beta Sector already has several rivers and lakes mentioned in the desc; perhaps some of these could tie in?
 
Attractions