Ostorhinchus doederleini
Ostorhinchus doederleini is a species of fish in the cardinalfish family, also known by the common names Doederlein's cardinalfish and fourline cardinalfish. In Japanese it is called osuji-ishimochi. It is native to subtropical regions of the western Pacific Ocean, its distribution extending from Japan to Taiwan and Australia to New Caledonia and the Kermadec Islands. This species reaches about 14 centimeters long. The male and female look alike. The body is pinkish or brownish with four brown lines reaching nearly from head to tail. There is a black spot at the base of the tail. The fish grows until it reaches 3 years of age, and it lives to a maximum age of about 7 years. This fish lives in rocky habitat types near the shore, such as ledges. It is nocturnal. During the day it hides in caves and rock crevices. It feeds on invertebrates, especially gammarid amphipods. It is solitary until the breeding season, when it forms pairs. The pairings are short-lived, with male and female courting for a few hours during the afternoon for a few days in a row. During these visits the pair performs a "parallel-circling" behavior, in which they circle each other with the