PROBLEM TO BE SOLVED: To enable to always dispose a shutter plate disposed at a partition wall in a water tank so that fishes in each of accommodation chambers are not seen each other, and to make the storage and control thereof convenient in an aquarium apparatus in which the inside of one water tank body is divided into a pair of fish accommodation chambers by partitioning with a transparent partition wall to independently accommodate a fighting fish of Betta taeniata or the like.SOLUTION: In an opaque partition wall plate W partitioning the inside of a water tank body V, an opaque shutter plate S having two or more second small holes H2 corresponding to two or more first small holes H1 of the partition wall plate W and overlapping with the partition wall plate W is guided and supported to slide between an opening position A in which the first and the second small holes H1, H2 mutually fit in and a closing position B in which the first and the second small holes H1, H2 do not mutually fit in to be shut off, when the shutter plate is in the opening position A, fishes F2, F1 in the other fish accommodation chambers C2, C1 can be seen from each of fish accommodating chambers C1, C2 through the first and the second small holes H1, H2 having mutually fitted in.COPYRIGHT: (C)2012,JPO&INPIT【課題】1つの水槽本体内を透明な隔壁で仕切って一対の魚収容室に区画し、その各々にベタ等の闘魚を個別に収容するようにした水槽装置において、各収容室の魚相互が見えないよう隔壁に設けられるシャッター板を常に水槽内に配備できるようにして、その保管、管理を簡便にする。【解決手段】水槽本体V内を仕切る不透明な隔壁板Wには、その隔壁板Wの複数の第1小孔H1に対応した複数の第2小孔H2を有して該隔壁板Wに重合する非透明なシャッター板Sが、第1及び第2小孔H1,H2相互が一致する開放位置Aと、第1及び第2小孔H1,H2相互が不一致となって遮断される閉鎖位置Bとの間でスライドし得るように案内、支持され、シャッター板Sが開放位置Aに在るときには、互いに一致した第1及び第2小孔H1,H2を通して各々の魚収容室C1,C2から他方の魚収容室C2,C1内の魚F2,F1が視認可能である。【選択図】図1
