First record of the case of pachyostotic bone in the Narrow-barred Spanish mackerel, Scomberomorus commerson and the African pompano, Alectis ciliaris from the coastal waters of the Gulf of Thailand

Abstract

The Narrow-barred Spanish mackerel (Scomberomorus commerson) and the African pompano (Alectis ciliaris) were the important commercial value fish in Thailand. However, the morphology and the anatomy of the bone have not been studied. This research aimed to study the anatomy and the morphology of pachyostotic bone. The fish samples were collected from Rayong Province, Thailand during December 2019. The characteristics of bone were described and photographed by using a digital camera. The present study revealed the first finding of pachyostotic bone in these fish species from the coastal waters of the Gulf of Thailand. This study was found in different regions of pachyostotic bone including in the neural spine, supraoccipital, postcleithrum, and dorsal pterygiophore. Although the pachyostotic bone does not affect consumption, it may be a complication for filleting in fish processing industries as the presence of pachyostotic bone along the longitudinal axis of teleost. For this reason, pachyostotic bone can affect on a high commercial value of price such as the Narrow-barred Spanish mackerel.