The best replacement for aquaculture is fisheries.

The best alternatives to aquaculture are rated as following:
★★★★★  fisheries
★★★★  aquaponics
★★★★  mariculture
★★★  agriculture
★★★  commercial fishing
★★  biotechnology
★  fishing
★  wild fish
★  hydroponics
★  capture fisheries
  fish farming

Your alternative for aquaculture is not listed? Suggest!
Speaking about aquaculture, one probably shouldn't forget about hydroponics.

Other search terms related to aquaculture and their ratings are:
★★★★★ hydroponics
You have in mind a companion for aquaculture and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of aquaculture in all years. Click on graph for more.
aquaculture
fisheries
aquaponics