To provide a floating material removing device in aquarium in a fish tank of raw fish capable of improving the effect of alleviating the frequency of replacement of water due to contamination of water caused by residues of food or dung or the like.SOLUTION: A floating matter removing device for immersing in a water tank, which is immersed in a water tank, has a bowl-shaped frame, and has a chimney-like protruding portion near the center, and at least one hole or , There is a U-shaped cutout, and the bottom surface of the bowl shape and chimney shape is shaped so that water does not pass through it.(FIG.【課題】生魚類の水槽にあって、エサの残さいや糞等による水の汚れに伴う水の取り換え頻度の軽減効果を上げることができる水槽内浮遊物除去具を提供する。【解決手段】水槽内に沈める水槽内浮遊物除去具であり、お椀状の枠を備え、中央付近には煙突状の突出部を備える、煙突状の突出物には少なくとも1個以上の孔又は、U字状の切り口があり、お椀状と煙突状の底面は、水が通過しない形状になっている。【選択図】図2
