Aquaculture products and sea fisheries have attracted worldwide attention in recent decades as a new, highly profitable farming business. However, aquaculture represents a closed ecosystem.

With aquaculture, it is important to establish a good management system to avoid risks such as poor water quality, overcrowded aquaria, increased ammonia and nitrite levels in the water, changes in pH value, sudden changes in temperature, or a drop in oxygen levels. Such risk factors can lead to the sudden death of all fish in the ponds, resulting in huge economic losses. Infectious diseases can also threaten the farms including bacterial diseases (e.g., Flavobacterium columnare and Pseudomonas fluorescens), or parasitic diseases (such as protozoal and nematode infestation).

Most of these problems can be improved by using high-quality raw materials in fish feed along with natural feed additives. The ingredients for fish feed must be carefully selected to match the needs of the fish and to withstand the treatment of the feed during production with high temperature in the extruders.