there is many aspect and factor to consider how to aquaculture the some pelagic coral predator such trevallies and pompano.. there is some hatcery like BPPAL lombok and maluku in indonesia with some work has can to produced egg and juvenile of that fish species or you can afford to buy some nature collecting juvenile.. the aquaculture net cage can be used in aquaculture like some brands from indonesia too... like stargold aquaculture cage from bandung city.. browse in youtube *stargold aquaculture cage# for better long lasting using in auaculture inshore or offshore . because trevalies and pompano are many main dish in asian and australian seafood cuisine, especially southeast asia, hongkong, japan and highly consume seafood country.... because too...those fish has good taste of meat and easy in maintenance... and highly price for live in high end seafood restaurant

Alan Terimah kasih! Very helpful information. I will contact the hatcheries when the time is right!.

Okay..Andrew.. hope your project and your plan be realized clearly

May I add a couple of considerations to the horizon scanning - that is before you operationalise based on good market price of the intended culture species:

(a) carnivorous species need (animal) protein as feed not only soya - see current discussions in the salmon industry, where I heard a Norvegian nutrionist suggest at a conference two years ago that overreliance on farmed salmon lacking essential micronutrients they can't get from soya, is suspected to reduce IQ in school fed children. Soya percentage is high because there is not enough fish meal and oil going around at reasonable prices for the scale of the salmon operations. On land, we do not raise lions (top predators) but cows, goats etc (low in food web).

(b) From what I know these species are not yet domesticated (indeed Alan Pratama suggests ideally to source wild caught juveniles for fattening rather than trying to master the whole life cycle). Our biological knowledge about these species is very course so keeping them in netcages is likely to require a lot of trial and error (and associated costs which will only pay, if the trials are very systematic with modulating a lot fewer parameters than you have reliable measuring points, recorded systematically and with high frequency and properly analysed to be able to draw conclusions rather than guess work on what may be background noise in the data). Again, on land we have domesticated a small number of species and left the gene pool of the rest in peace. All wild or semi-wild animals are a silent gene pool reserve which may be invaluable in times of climate change. We find the same basic principle with plants. We already observe poleward movement of mobile animal species in the sea to the tune of 4-800 m/year (See William Cheung's work on these climate induced effects). As warmer water contains less dissolved oxygen species will remain smaller in warmer water simply because they can not get enough oxygen to transform feed into body mass. When you have a population that is already heavily fished and therefore has lost the better part of its gene pool because they are not able to grow to big sizes, a warming ocean will exacerbate that effet (this has just been analysed systematically and published by Free et al. in Science: "Impacts of historical warming on marine fisheries production" - Christopher M. Free*, James T. Thorson, Malin L. Pinsky, Kiva L. Oken, John Wiedenmann, Olaf P. Jensen).

(c) Perhaps it's a heretical thought for an aquaculturist - would it perhaps be more robust to invest in an MPA to let nature do the job, though there will also be a cost there, but of a different nature - an investment into the social system of the coastal and fishing people in the area to get them to help stop fishing in a particular area, patrol it and share the benefits of regeneration and spill-over which makes fishing on the fringes highly cost-effective. It might also produce more diversified harvests and thus enable you to cater for trends observed in many places of consumers demanding greater variety. Control over some land and seascapes is required either way, also for managing cages and the attendent infrastructure on land. As an innovator, you might wish to consider another still unconventional road (heavier on social competence, but no tricky and costly machinery and all manners of negative side effects of cage culture such as disease, aufwuchs, sourcing suitable feeds, dead zones...) that offers a lot more stable yields also in the long term.

All this to say, it might be worth taking another look from a broader perspective before jumping into applying a business model running into problems in many places now. Apologies if I have made a wrong assumption and you've been through even more options than could be gleaned from your focused question.

Best and success in your venture.

Granted, Oregon is not where you want to set up shop, but the article below illustrates the scale of the problems we're facing with ocean warming, acidification and deoxygenation (hypoxia): https://eu.statesmanjournal.com/story/tech/science/environment/2019/04/09/bill-fund-study-oregon-pacific-ocean-warming-threat-fishing-industry/3344534002/

Hypoxia arises in warming waters and has accelerated and was extended by introduction of excess nutrients from diffuse agricultural run-off even before the significant ocean warming we observe nowadays. Hypoxia is typically strong around net cages in the sea. One well documented exception we studied and explored with Chinese colleagues was mitigation by having a semi-controlled system working to good effect: when you know the ocean currents put filter feeders first in line of where excess land-based nutrients may come from, then place fish cages downstream, then kelp to take up excess nutrients from the cages (but kelp and other large algae used there are temperate or cold water species, so something else need to be used in the tropics). The booklet with summary papers of the research the SPEAR project is publicly available.

Thanks Cornelia Very valid points. That is why carp, Tilapia and Pangasius make up most of the worldwide aquaculture production outside of salmon, Barramundi, and grouper sp. I think it is all about building "the better mouse trap" even if you don't have mice but want to brag how good it is, if there were!