Masanori Kohda

TL;DR: It is shown that a fish, the cleaner wrasse Labroides dimidiatus, shows behaviour that may reasonably be interpreted as passing through all phases of the mark test: social reactions towards the reflection, repeated idiosyncratic behaviours towards the mirror, and frequent observation of their reflection.

TL;DR: The molecular analysis revealed that the helpers were mostly unrelated to dominant breeders, many helpers of both sexes contributed genetically to the next generations, and large young unrelated to group members were detected at 30% of observed nests, which may be due to breeder (or helper) replacements and immigration of young.

TL;DR: The hypothesis states that repulsive behavior between conspecific males (male–male repulsion) creates space for competing species, which promotes their coexistence, which can explain the coexistence of two competing species even when their ecological niches completely overlap in spatially homogeneous environments.

TL;DR: The presence of lefty and righty mouth morphs in the herbivorous cichlid Neolamprologus moorii is revealed, although the degree of deviation was not large.

TL;DR: Digital models are used to demonstrate that facial features are the visual cue used for individual recognition in the social fish Neolamprologus pulcher, and suggest that fish can distinguish individuals accurately using facial colour patterns.