Live feed contribute major role on ornamental fish diet. Blood worms are larval stage of the Chironomus midge fly. It contains more haemoglobin content & active chemicals than tubifex. Chironomid larvae contain pigments such as carotene, canthaxanthin, lutein,astaxanthin and xanthophyll. It serves good nutritional source for fishes. By enriching the bloodworm with HUFA the various improvements are absorbed. A bloodworm cultured either by pond cultivation or artificial cultivation. In pond a bloodworm are cultivated by adding fertilizers such as yeast, mineral fertilizer (ammonium nitrate), wheat or rice bran, Chicken manure, Baker's Yeast and Spirulina powder. The temperature is maintained at 17-28ºc. Algae cultured in the pond are controlled by the addition of adequate nitrogen, phosphate potassium, and soybean by -products such as fertilizer. Several weeks later the water forms a darker green suggesting that plenty blood worms. Blood worms are cultured in the pond, in algae containing high essential fatty acid (HUFA's) necessary for sustained reproduce of ornamental fishes Enriched blood worms are fed with 8-10% of body weight of total brood stock fish /day.
To conclude, The parameters such as growth rate,fecundity,larval survival are found better in fishes which fed by enriched bloodworms.