PROBLEM TO BE SOLVED: To enable easy observing of the tortoises, etc. float on the water surface or climb onto the island from a bay by forming a wide closed water zone in a floating island body in an aquarium apparatus with a floating island for rearing aquatic animals such as tortoises which can climb onto the island and preventing such inconvenience that the grown tortoises, etc. are caught in a peripheral wall of the closed water zone and can not escape.SOLUTION: The aquarium apparatus includes: the floating island body 1 onto which the tortoises, etc. can climb a guide bar B to be fitted to the floating island body 1 in such a way as slidable in the vertical direction to guide the lifting of the floating island body 1 and a support means S for supporting the guide bar B to an aquarium A. One side surface of the floating island body 1 is formed as a flat vertical surface 1v approximated and opposed to one sidewall As of the aquarium A, and a notched part 1a opened in the vertical direction on the vertical surface 1v is disposed in the floating island body 1. A bay C in which the tortoises, etc. can float is formed by the notched part 1a. The inner peripheral surface of the notched part 1a is a slope 1si gradually descending toward the center of the bay C.COPYRIGHT: (C)2012,JPO&INPIT【課題】上陸可能な亀等の水生動物を飼育するための浮島付き水槽装置において、浮島本体に広い閉鎖水域を形成して、そこで亀等が水面を浮游したり湾部から上陸したりする様子を容易に観察できるようにし、しかも成長した亀等が閉鎖水域の周壁に嵌まって脱出できなくなったりする不都合を回避できるようにする。【解決手段】亀等が上陸可能な浮島本体1と、その浮島本体1の昇降を案内すべく浮島本体1に上下摺動可能に嵌挿される案内バーBと、その案内バーBを水槽Aに支持させる支持手段Sとを備え、浮島本体1の一側面を、水槽Aの一側壁Asに近接、対向する平坦な鉛直面1vに形成すると共に、その鉛直面1vに開口した上下開放の切欠き部1aを浮島本体1に設けて、その切欠き部1aにより、亀等が浮游可能な湾部Cを形成し、前記切欠き部1aの内周面は湾部Cの中心部に向かって徐々に下る斜面1siとされる。【選択図】図2
