< Topic >In order the occasion where the float island (floating body) which raises aquatic animal such as turtle and newt is removed frequently, for time not to catch, the float island (floating body) which is formed and the tank device which uses those are offered.SolutionsPutting side wall 3 to one side wall 3 of tank, 1, the magnet body 5 which consists of magnet piece 6A of pair and 6B it adsorbs mutually. It consists volt/bolt the float island itself float island 10 as the magnetic substance which is installed in 11 and float island itself 11. In the position where it opposes to the 1st magnet piece 6A inside tank 1, the applied part 13 which possesses the thick region in thickness direction is formed in float island itself 11. The sulcus 14 is provided in applied part 13, volt/bolt is screwed in to the sulcus 14. Interposing 1st magnet piece 6A into furrowed 14, it makes with volt/bolt and 1st magnet piece adsorb 6A.< Choice figure >Drawing 1【課題】亀やイモリ等の水生動物を飼育する浮島(浮遊物体)を頻繁に取り外す際に、手間の掛からないように構成した浮島(浮遊物体)及びそれらを用いた水槽装置を提供する。【解決手段】水槽1の1つの側壁3に、側壁3を挟んで一対の磁石片6A、6Bからなる磁石体5を互いに吸着する。浮島10を浮島本体11と浮島本体11に取り付けた磁性体としてのボルトとで構成する。浮島本体11には、水槽1内側の第1の磁石片6Aに対向する位置に、厚み方向に厚い部位を有する装着部13を形成する。装着部13には、縦溝14を設け、縦溝14にボルトをねじ込んでいる。縦溝14内に第1の磁石片6Aを挿入して、ボルトと第1の磁石片6Aとを吸着させる。【選択図】図1
