Rotifer is used as initial feed for seabass larvae soon after mouth opening (mouth size, 250 m) at 48 h of hatching (1.6 0.2 mm). Rotifer is supplied for seabass larvae up to the 9th day post hatch (dph) and from 10th to 15th dph; rotifer is supplied along with Artemia nauplii (Dhert et al. 1990). Usually, rotifer is supplied to the seabass larvae at the rate of 2030 nos/ml in the rearing tank