Diets for giant grouper containing 40% soy and algal ingredients yielded similar growth as diets based on fish ingredients.

Schizochytrium limacinum meal can be used as the main lipid source in diets for giant grouper.

Higher DHA:EPA ratios in fish fillet are found with increased use of S. limacinum meal in the diet.

High dietary levels of soy and algal ingredients induce enteritis and lower lipid retention in giant grouper.