Abstract
The presence of lordosis in the caudal peduncle of a dolphin fish, Coryphaena hippurus, was reported for the first time in Mexican waters. During a fishing tournament in Puerto Ángel, Oaxaca, an adult male measuring 93 cm in fork length was captured. This organism exhibited a significant deformity in caudal vertebrae 10 to 14. Despite the deformity, it was determined to be functional for the population. The allometric condition factor was 1.1. Its probable age is one to three years. The deformity is likely due to the teratogenic effects of hydrocarbon or agrochemical pollutants dumped on the coast. Continuous monitoring of fishery resources is recommended to detect cases of external anomalies and identify their causes, as these can be used to establish environmental mitigation measures. Both to reduce their prevalence and to make them as bioindicators of the health status of the ecosystem.
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