Hwang et al. (Antonie van Leeuwenhoek 109:1345–1352, 2016) proposed the reclassification of Halomonas caseinilytica (Wu et al. 2008) as a later synonym of Halomonas sinaiensis, based on the publication of the latter name in 2007 by Romano et al. However, the name H. sinaiensis was validly published only in 2011. Therefore the proposal by Hwang et al. is not appropriate; instead, the name H. sinaiensis can be proposed as a later synonym of H. casinilytica.