A wide variety of fish and invertebrates are associated with marine jellyfishes, and their interactions are diverse. We preliminarily investigated symbionts on two species of rhizostome jellyfishes collected from Leyte and Palawan Islands, the Philippines, in August 2013. The collected jellyfishes were Lobonemoides robustus Stiasny on both islands and Acromitus maculosus Light on Palawan Island. Lobonemoides robustus is commercially harvested on both islands, and seems to have been previously misidentified as Lobonema smithi Mayer. The associated fish juveniles on these hosts were identified as Alepes djedaba (Forsskål) and Carangoides equula (Temminck & Schlegel). Alepes djedaba is closely associated with many species of scyphozoan jellyfish broadly in the southeastern Asian waters. The associations of carangids with jellyfish are also reviewed.

Anisomysis (Javanisomysis) gutzui Băcescu, 1992 was reported as a characteristic species, of which the fourth male pleopod possesses an un-segmented exopod and no endopod. The species is placed in the valid genus Javanisomysis on the basis of the characteristics of the fourth male pleopod; however, the definition of the genus was insufficient. In the present paper, re-examination of the genus Javanisomysis is carried out on the basis of paratypes loaned from the depository in Romania. We found that major morphological characteristics of the types are common to those of the species of the genus Anisomysis, particularly in the forms of the antennal scale, labrum, thoracopodal endopods, and fourth male pleopod. On the basis of the present results, the genus Javanisomysis is reinstated as a subgenus in the genus Anisomysis. The subgenus Javanisomysis is allied to the subgenus Anisomysis in the forms of the body, eye, antennular peduncle, and mandibular palp, but is separable in the following characteristics: carapace armed with spinules on the antero-lateral margin; in the fourth male pleopodal exopod the first segment as long as or slightly shorter than the third segment, excluding the terminal setae; and the telson with un-articulated denticles on the lateral margin. In addition, A. (J.) similis n. sp. is described on the basis of specimens collected from Phuket, Thailand. The new species can be separated from A. (J.) gutzui as follows: the fourth male pleopod without a projection at the expanded corner on the first segment, the telson distally triangular in shape, and an undivided carpopropodus of the sixth thoracopodal endopod in females. Anisomysis (A.) thurneysseni Nouvel, 1973 also shares with the new species such remarkable features as those in the spinules on the carapace, denticles on the telson, and the length of the first segment relative to the third one in the fourth male pleopodal exopod; and accordingly this species is also considered to be a member of the subgenus Javanisomysis. This subgenus thus currently contains three species, A. (J.) gutzui Băcescu, 1992, A. (J.) similis n. sp. and A. (J.) thurneysseni Nouvel, 1973.

Two new species of Anisomysis Hansen, 1910 (Mysida, Mysidae), Anisomysis (Anisomysis) spinaintus sp. n. and Anisomysis (Anisomysis) phuketensis sp. n., from coral-reef waters in Thailand are described. Anisomysis (Anisomysis) spinaintus, collected in the Chaolao Beach, Chanthaburi Province, is distinguished from the closely allied species Anisomysis (Anisomysis) incisa Tattersall, 1936, and Anisomysis (Anisomysis) hawaiiensis Murano, 1995, by the presence of 6–9 spines on the apical cleft of telson, which are absent in the latter two allied species. The new species can also be distinguished from Anisomysis (Anisomysis) aikawai Ii, 1964, by the presence of a deep telson cleft and a large number of spines on the lateral margin of telson. Anisomysis (Anisomysis) phuketensis sp. n., collected in Ko Lon, Phuket, is distinguished from the allied species Anisomysis (Anisomysis) robustispina Panampunnayil, 1984, by having a short telson and a pair of long spines on the apical part of the telson. Keys to the subgenera and species of Anisomysis, including the two new species, are presented.