Look, indoor rearing of LMB from swim up fry to fingerling stages isn't uncomplicated and it is not widely or commonly practiced. I hadn't done a google search on it in a few years but my library literally has no papers on the subject. I just googled today and found this :

https://portal.nifa.usda.gov/web/cr...-critical-early-life-history-stages.html

From their summary:

Quote
Largemouth bass (LMB) is a high-value freshwater aquaculture species with a rapidly expanding food fish market in North America. However, current rearing practices depend on uncontrollable pond-based technologies plagued by high mortality, especially during the early life stages (i.e., egg to early fingerlings). As such, complete indoor intensive culture of LMB would improve production yields by circumventing the high rates of mortality associated with these initial pond stages.


The goal:

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Our long-term goal is to develop intensive indoor rearing strategies for a commercially important food fish (largemouth bass) during the critical early life stages.

The results of this study will be made available to the public in the 2027 - 2028 time frame I suspect. The project was funded and began last year and will be competed in 2027.

They are going to try a number of prospective strategies feeding cultured live foods (rotifers and artemia) and then transitioning to feed. It will be interesting to see which of the strategies work best. The main differences between strategies will be the age when live food is eliminated.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers