International Science Community Association International Research Journal of Biological Sciences 2278-3202 7 6 2018 06 10 Embryonic and larval development of mirror carp (Cyprinuscarpio var. specularis) 1 8 EN Dil Afroza Khanom 1 Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh Ananna Das 2 Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh Md. Abu Sayed Jewel 3 Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh Md. Ayenuddin Haque 4 Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh Md. Delwer Hossain 5 Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh > Research Paper 2018 1 28 2018 06 10 Embryonic and larval development stages of Mirror carp, Cyprinuscarpio var. specularis were studied at Fish seed multiplication farm, Puthia, Rajshahi, Bangladesh from November 2016 to April 2017. Brood fishes (body weight 2.5-3kg and 1.2-1.5kg, for male and female, respectively) were collected from the hatchery pond, and two separate dozes of pituitary hormone were used for induction of reproductive. Spawning occurred between 8-8.5h after the 2nd injection. The fertilized eggs were adhesive, round in shape and yellowish to whitish in color and its diameter was 1.10±0.02mm. The stages of embryonic development observed with zygote, followed by cleavage, early morula, blastula, gastrula, segmentation, pharyngula and until hatching. After 45min of fertilization first cleavage was observed, whereas two cells, four cells, eight cells, and sixteen cells stages were found after 45min, 60min, 90min, and 2h of fertilization, respectively. The early morula, blastula, gastrula, segmentation and pharyngula stages were visualized after 3, 7, 10, 13, 22h of fertilization, respectively. Hatching observed after 47h of fertilization and newly hatched larva measured 2.5±0.03 mm in total length. Larval development was observed until 2 days after hatching. Yolk sac was greatly reduced 2days after hatching and the larvae started swimming freely. The study concluded that embryonic developmental cycle completed onset of fertilization within 44.5h and larval developmental cycles completed from onset of hatching within 2 days. Copyright@ International Science Community Association