PROBLEM TO BE SOLVED: To provide a water tank for aquarium fish which can carry out a water exchanging operation in the body of a water tank and suppress the rise of water temperature in the water tank body.SOLUTION: A lid body 30 for the water tank body 2 is placed so as to generate a space 51 between the lid body 30 and an upper opening periphery 2a in the vertical direction above the upper opening periphery 2a in the water tank body 2 of the water tank 1 for aquarium fish.COPYRIGHT: (C)2013,JPO&INPIT【課題】水槽本体内の水の交換作業を容易に行うことができ、更に、水槽本体内の水温の上昇を抑制することができる観賞魚用水槽を提供すること。【解決手段】観賞魚用水槽1の水槽本体2内の上開口周縁2aよりも上側に、水槽本体用蓋体30が上開口周縁2aとの間に上下方向に隙間51が生じる態様にして配置されている。【選択図】図2
