Muraenidae is a species-rich family, with relationships among genera and species and taxonomy that have not been completely clarified. Few cytogenetic studies have been conducted on this family, and all of them showed the same diploid chromosome number (2n=42) but with conspicuous karyotypic variation among species. The Mediterranean moray eel Gymnothorax unicolor was previously cytogenetically...

Leptocephali are the characteristic larvae of the superorder Elopomorpha that are difficult to identify at the species level. In this study, we used DNA barcoding (i.e. short genetic sequences of DNA used as unique species tags) coupled with classical taxonomic methods to identify leptocephali in the southern Adriatic Sea. This information will provide an assessment of the biodiversity of the e...

Bathycongrus castlei Smith and Ho, 2018, previously recorded only from Taiwan, is newly reported Japan, based on two specimens (352+, 362 mm total length) collected coastal waters in Tosa Bay, Kochi Prefecture at depths ranging 128–315 m. differs congeners retrotinctus (Jordan Snyder, 1901) wallacei (Castle, 1968), having an intermediate number of vertebrae (159–162 B. vs. 143–151 172–181 walla...