Larval Development of The Freshwater Angelfish Pterophyllum scalare Teleostei Cichlidae

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In this study, the larval development of freshwater angelfish, Pterophyllum scalare, was described under controlled aquarium conditions.Major histomorphological changes and the allometric growth patterns during the larval development have been described.The larvae were obtained from three pairs of freshwater angelfish, which were maintained in glass tanks.The larvae were sampled for measurement and photography.They were observed under a stereomicroscope, photographed using a photomicrographic system.The larval development of angelfish were described from 1 days after hatching (DAH) to 24 DAH.Embryonic developmental stage was completed at day 3 after spawning at 24±1ºC.The newly hatched larvae had 4.24±0.28mm total length (TL).The mouth opened at 3 DAH.The larvae started to swim actively within the next 3-4 days.Notochord flexion began at 3-4 DAH.The yolk sac has been totally absorbed at 6 DAH.The metamorphosis was completed and the larvae transformed into juveniles at 23-24 DAH.