Opinions and declarations Rendered by the International Commission on Zoological Nomenclature

This fish can be found in both fresh and brackish water (Lim & Ng, 1990 as Mystus sp.; Lim & Low, 2002). The canal that flows from the Bishan – Ang Mo Kio Park is part of the Kallang drainage system which has since become land-locked with the erection of the Marina Barrage (Tan et al., 2010). This seems to be the first record of Mystus gulio from the Kallang drainage

In Singapore, three species of blennies of the genus Omobranchus are known to seek refuge in dead wood that become exposed to the air during low tide (Lim et al., 2017: 158). This seems to be the first instance where a ptereleotrid dart-goby is found in a similar situation there. At the mangroves of the Tukang Besi Archipelago in Sulawesi, Indonesia, the congener Parioglossus interruptus, was discovered taking refuge in dead wood riddled with tunnels made by shipworms (a type of boring mollusc of the family Teredinidae) exposed during low tide and at night, apparently to evade predators (Hendy et al. 2013). It is believed that protection from the heat and the retention of sufficient water in the crevices enable the fish survive in the wood during low tide. H. H. Tan (personal observation) has collected Parioglossus palustris in the mangrove creek at Loyang at the north-eastern edge of Singapore Island. Specimens were obtained in nets swept through mid-water, indicating they were swimming gregariously in the open. One of the examples from Loyang is illustrated in Larson & Lim (2005: 156). Indeed, Parioglossus palustris is known to form aggregations near the surface of marine lakes, tidal streams and mangroves (Allen & Erdmann, 2012: 997). This may be the first time that the species Parioglossus palustris is reported concealed within pieces of wood exposed to the air. Note: The authors wish to thank the National Parks Board for permission to Dr Simon Cragg to conduct research in the mangroves of Berlayer Creek. Our gratitude to Lee Khek Yan for her help in the field.

Opinions and declarations Rendered by the International Commission on Zoological Nomenclature

Opinions and declarations Rendered by the International Commission on Zoological Nomenclature