The manner of maternal care of the hyperiid amphipod, Oxycephalus clausi, was investigated at Senzaki, Nagato, Yamaguchi Prefecture, Japan. In situ observation underwater over a period of seven years as well as in vitro observation under laboratory conditions were conducted. Most of the amphipods (90.1%) were associated with gelatinous zooplankton. At least 13 species, including cnidarians, ctenophores, and salps hosted O. clausi amphipods. However, females presumably caring for demarsupiated juveniles were found only on the ctenophore Ocyropsis fusca, suggesting that O. clausi is selective in its choice of host species for reproduction. We also confirmed for the first time that O. clausi juveniles consume the surface tissue of the host ctenophore under laboratory conditions, indicating that they most likely prey on host tissue before leaving maternal care and then disperse from the host.

在日本山口县长门县仙鹤市，研究了双节肢动物双足纲纲纲Oxycephalus clausi的产妇护理方式。进行了长达七年的水下原位观察以及实验室条件下的体外观察。大多数两栖动物与胶状浮游动物有关（90.1％）。至少有13个物种，包括虫，畸足类动物和小蜂共寄居了克劳西鳄两栖纲。然而，据推测仅在the鱼Ocyropsis fusca上发现了雌性去皮幼体的雌性，这表明青苔O.clausi在选择繁殖宿主物种方面具有选择性。我们还首次确认O. clausi幼鱼在实验室条件下会消耗宿主c虫的表层组织，这表明它们很可能在离开母体护理之前从宿主组织中捕食，然后从宿主中扩散。