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Uropterygius cyamommatus, new species, is described based on nine specimens from limestone anchialine caves in Christmas Island and Panglao Island. This species is a small-sized, elongated moray eel belonging to the uniform brown-coloured species group of the genus. It differs from all congeners of Uropterygius in having very small eyes (3.0-4.6% of head length), a relatively long tail (56.3-61.1% of total length), and a comparatively large number of vertebrae (total vertebrae 141-149). The new species represents the first-recorded moray eel that inhabits anchialine caves. [ABSTRACT FROM AUTHOR]

A new species of the deep-sea porter crab genus, Gordonopsis Guinot & Richer de Forges, 1995 (Homolidae), is described from the Andaman Sea in the eastern Indian Ocean. Gordonopsis has previously been represented by G. profundorum (Alcock & Anderson, 1899) from the western Indian Ocean and G. pacifica Takeda & Suyama, 2019 from Japan. Gordonopsis robusta, new species, differs markedly from G. profundorum and G. pacifica in its more globose carapace, more tomentose body, and proportionately shorter ambulatory meri, notably that of the last pair of legs which just reach the gastric groove on the carapace. [ABSTRACT FROM AUTHOR]

Eight porcellanid species are reported from Christmas Island and the Cocos (Keeling) Islands in the southeastern Indian Ocean, based on specimens collected by three expeditions to the islands from 2010 to 2012. Of them, five species are new local records: Petrolisthes asiaticus (Leach, 1820), P. bispinosus Borradaile, 1900, P. fimbriatus Borradaile, 1898, P. pubescens Stimpson, 1858, and P. scabriculus (Dana, 1852). Petrolisthes bispinosus and P. fimbriatus are reported for the first time from the Indian Ocean. [ABSTRACT FROM AUTHOR]