| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for, facilitating maintenance and management, and activating behavior of fishes not capable of being swum together, without fixing a position of each fish body, in a water tank having a same filtration unit, and in particular, in a Betta splendens, only by a fixed classification method in a same water tank, being swum together of fishes can be avoided, but it may cause behavior reduction due to contact to a fixing body for a long period.SOLUTION: A transparent container which can float on water, and has a cavity for falling inner water stream and insoluble matters, is used, and the container moves along circulation of water stream of a filtration unit, for solving the problem.SELECTED DRAWING: Figure 1 |
