Abnormalities in the marine fishes are encountered around the world. The saddleback syndrome a deformity in the dorsal fin of the fish. They could be due to various environmental changes, predation and also could be due to anthropogenic activities like marine pollution induced due to heavy metal pollution etc. A multi species and multi gears fishery exists in India. Visakhapatnam fishing harbor is a major fish landing center in the south east coast of India. Different types of marine fishes are commonly landed here. On continuous observation of the marine fish landings of Visakhapatnam, the above syndrome was recorded in black pomfret (Parastromateus niger). The dorsal fin of the observed specimen of P. niger was having severe deformity in the form of shortening of the neural spines and complete loss of pterygiophores associated with four dorsal spines. The seven soft rays were observed to be missing in the above specimen. The X-ray radiography conformed the deformity in the above specimen. The deformity appears to be there from the early developmental stage. The deformed specimen was compared with a normal specimen. The possible factors and various causative agents of the saddleback syndrome for the observed specimen are discussed in this paper.
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We express our sincere gratitude to Dr. M. Kathirvel, Former Principal Scientist, Central Institute of Brackish water Aquaculture (ICAR-Government of India), Chennai-600 028 for critical evaluation of manuscript and offering valuable suggestions.
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Silambarasan, K., Govindaraj, K., Kar, A.B. et al. Saddleback Syndrome in Wild Black Pomfret Parastromateus niger (Bloch, 1795), From Southeast Coast of India. Thalassas (2021). https://doi.org/10.1007/s41208-021-00287-3
- Visakhapatnam fishing harbor
- Multi species and multi gear fishery
- Parastromateus niger