PROBLEM TO BE SOLVED: To provide a square and economical subdivided concrete aquarium for cultivating aquatic life, equipped with a temporarily constructed roof having sunbeam permeability.SOLUTION: The square subdivided concrete aquarium is constituted as follows. A wall part of the square cultivating aquarium having one side with a required size is formed by connecting and fixing a desired number of L-shaped concrete blocks which are standardized in a field of public construction and architecture to form the square shape by connecting and fixing the four sides by subjecting the bottom side parts of the wall part to cutting processing or without subjecting the parts to the cutting processing to provide one small aquarium body for cultivating the aquatic life. A triangle- or dome-shaped temporarily constructed roof capable of permeating the sunbeam is attached onto the aquarium body, and the inside and outside of the aquarium body are made into a suitable environment in which the aquatic life can grow. The productivity in the land cultivation of the aquatic life can be improved by regularly constructing a plurality of the subdivided aquariums for cultivating the aquatic life, equipped with the temporarily constructed roofs and constructed thus to a village shape in an inexpensive site such as beach.COPYRIGHT: (C)2012,JPO&INPIT【課題】 本発明の課題は、太陽光線透過性の仮設屋根を備えたコンクリート製で方形の経済的な小割水棲生物養殖水槽を提供する事にある。【解決手段】 上記課題を解決する為に、土木建築分野に於いて規格化されたコンクリート製L型ブロックを、所望数連結固着して、所望寸法の一辺の方形養殖水槽壁部を形成し、此の壁部の底辺部を切断加工するかせずして、其の四辺を以って方形に連結固着して、一個の小型水棲生物養殖水槽本体を形成し、更に此の水槽本体上に、太陽光線を透過する三角形状又はドーム形状の仮設屋根を装着した後、其の水槽本体内外を、水棲生物が生長し得る好適環境に造成し、斯くの如く造成された複数個の仮設屋根付小割水棲生物養殖水槽を、海浜等の安価な用地に、集落状に整然と構築して、水棲生物陸上養殖の生産性を向上させた事を特徴とする。【選択図】図1