PROBLEM TO BE SOLVED: To suppress a drift current even when partitioning a water tank in a floating tank.SOLUTION: This floating tank includes: a roe receiving tray on which roes are placed and which has an opening； a water tank in which a lower net is installed below the roe receiving tray； an introduction port which is provided over a height to be the water surface of the water tank, and into which water is introduced； a partition plate which partitions the water tank into at least an introduction port side, and a section on an opposite side of the introduction port； a guide part which guides water introduced into the introduction port to the lower part of the lower net to let flow into the water tank through the lower net； and a drainage channel which lets water flowing into the water tank flow out to at least an introduction port side on the upper part of the water tank, and the opposite side of the introduction port and guides it to a drainage port.【課題】浮上槽において水槽内を区画しても偏流を抑制すること。【解決手段】本発明の浮上槽は、魚卵が載置され開口部を有する受卵盆、および受卵盆より下側に下網が設置される水槽と、水槽の水面となる高さよりも上部に設けられ、水が導入される導入口と、水槽を少なくとも導入口側および導入口と反対側の区画に分割する仕切板と、導入口に導入した水を下網の下部に誘導し、下網を通して水槽の内部に流入させる誘導部と、水槽に流入した水を、少なくとも水槽の上部の導入口側および導入口の反対側に流出させて排水口に導く排水路とを備える。【選択図】図１
