A new species of the genus Caprella Lamarck, 1801 (Crustacea, Amphipoda, Caprellidae) from Korea.

A new species of the genus Caprella, belonging to the family Caprellidae, has been collected from the East Sea of Korea. The new species, Caprella megabranchia sp. nov.

First record of the genus Mayer, 1890 (Crustacea, Amphipoda, Caprellidae) with a new species from Korean waters.

A new species of the genus Mayer, 1890 belonging to the family Caprellidae Leach, 1814 was collected from the South Sea in Korea. is morphologically similar to related congeners belonging to the genera Mayer, 1890 and , in having dorsal projections on pereonites, triarticulate mandibular palp, small or absent molar, and uniarticulate pereopods 3 and 4. However, this new species is distinguished from its congeners by the position and size of dorsal projection.

A new Gammarus species (Crustacea, Amphipoda, Gammaridae) from Northwestern Islands, South Korea.

A new species, Gammarus baengnyeongensis sp. nov., belonging to the family Gammaridae Leach, 1814 was collected from the Baengnyeongdo and Daecheongdo islands in South Korea.

A new species of the genus Boeck, 1876 (Crustacea, Amphipoda, Opisidae) and a new record for from the East Sea, South Korea.

Two species of the opisid genus have been collected from the East Sea of South Korea, one of them described as . The new species, is similar to ; however, it can be clearly distinguished from this species because it has 12 blunt robust setae in the palm of gnathopod 1. The other collected species, Narahara-Nakano, Kakui & Tomikawa, 2016 is previously known from Japanese waters (southeast of Akkeshi Bay, Hokkaido).

Two new species of the genus Microlysias (Crustacea, Amphipoda, Tryphosidae) from Korean Waters.

Two new species of the genus Microlysias Stebbing, 1918 belonging to the family Tryphosidae Lowry Stoddard, 1997 were collected from shallow Korean waters. The two new species are described as Microlysias rectangulatus and M. triangulus.

A new species of Monoliropus Mayer, 1903 (Crustacea, Amphipoda, Caprellidae) from Korean waters.

A new species of the genus Monoliropus belonging to the family Caprellidae was collected from the Yellow Sea, Korea. The new species differs from Monoliropusagilis Mayer, 1903, Monoliropuskazemii Momtazi & Sari, 2013, and Triprotellaamica Arimoto, 1970 as follows: 1) gnathopod 1 subrectangular; 2) pereonites 2-3 with acute triangular processes anterolaterally; 3) mandibular palp, apical article with four simple setae subdistally. The new species is fully illustrated and extensively compared with related species.

Arginine vasotocin (AVT) triggers courtship behavior without exposure to external stimuli and modulates the olfactory response of male Hynobius leechii salamanders.

To study the function of arginine vasotocin (AVT) in a specific courtship behavior (body undulation) in male Hynobius leechii, we injected various doses of AVT or an AVT V1a or V2 receptor antagonist into breeding and non-breeding males. After these injections, we placed the males alone or with breeding females in Petri dishes and measured the incidence and frequency of body undulation. Additionally, to test whether AVT modulates the olfactory response of males, we exposed breeding males that were injected with AVT to female odors and measured the same response.