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The present communication documents the first observation of a morphologic anomaly in a juvenile Spiny Butterfly Ray Gymnura altavela . This observation is interesting for its similarity with a rostral abnormality in an adult G. altavela from the Canary Islands 10 years earlier and with the one from a juvenile Long-tailed Butterfly Ray G. poecilura from the Western Indo-Pacific. Although no firm conclusions can be drawn from these records, it reinforces the hypothesis of a congenital disorder for this type of malformation within the genus. The individual appeared to have successfully adapted for its anomaly, suggesting that these instances are not of major conservation concern. Hence, long-term studies are required to monitor anomaly occurrences and to evaluate their potential threats.

journal of threatened taxa

&lt;b&gt;Rostral anomaly in a juvenile Spiny Butterfly Ray &lt;I&gt;Gymnura altavela&lt;/I&gt; (Linnaeus, 1758) (Elasmobranchii: Myliobatiformes: Gymnuridae) from the Canary Islands&lt;/b&gt;