General fishbowls have a rectangular or circular shape and have many sizes but are not very proper to protect many fry. Since many large fish are able to eat fry, the fry should be grown separately or many water plants are required to enable the fry to hide from the large fish. However, for these methods, a fry protection container needs to be additionally purchased or water plants need to be purchased. In addition, people change water of a fishbowl once about a week. Here, the fishbowl needs to be inclined to throw away the water, but fish in the fishbowl are able to fall from the fishbowl, and even if the water is changed after the fish are separated, pebbles are able to fall from the fishbowl so a drain is able to be jammed by the pebbles. Thus, a rail is installed in the half of the upper part of a fishbowl and a movable horseshoe-shaped rail is formed, and the horseshoe-shaped rail is not fixed to the fishbowl and a fixing device is installed in the upper part of the horseshoe-shaped rail to enable the movement of the horseshoe-shaped rail, and also, the rail is able to be fixed to a desired position. And a mesh frame is formed to be inserted into the rail. To separate fry and large fishes, the mesh frame is inserted into the rail vertical to the base side to divide the space into two parts, and thus, the fry are able to be safely grown. To change water, if a mesh is inserted into the rail in the upper part after the fish are separated, the half of the upper part of the fishbowl is blocked by the mesh, and thus, even if the fishbowl is inclined, only the water and foreign substances are able to go through the mesh while pebbles are blocked.COPYRIGHT KIPO 2018일반적으로 사람들이 사용하는 어항은 사각이나 원형으로 되어있다.어항들은 크기는 크지만 많은 치어를 보호하기 어렵다. 많은 큰 물고기들은 치어들을 잡아먹기 때문에 치어들을 따로 기르거나 아니면 수초를 많이 설치를 해서 물고기들이 큰 물고기들을 피해서 숨어서 살아야 한다. 하지만, 이러한 방법들은 모두 치어보호 통을 새로 사거나 아니면 수초들을 다시 사야한다. 또 사람들은 약 1주일에 1번씩 물고기들의 어항의 물을 갈아준다. 이때 물고기들 어항을 기울여서 물을 버려야 하는데 이때 물고기들이 어항 밖으로 떨어져 나갈 수도 있고, 물고기를 따로 빼고
