Which of the following is NOT an indicator of poor water quality in aquaculture?

Clear water is not an indicator of poor water quality in aquaculture because it generally signifies a balanced aquatic environment. In healthy systems, water clarity often indicates effective filtration and minimal particulate matter, which contributes positively to the health of aquatic organisms. Conversely, low dissolved oxygen, high ammonia levels, and unusual fish behaviors often signify underlying issues, such as excess organic material decomposition or inadequate oxygenation, leading to detrimental conditions for fish and other aquatic life. Clear water can be a sign that the system is functioning well, while the other options typically highlight problematic water conditions that could threaten the wellbeing of aquatic species.