Ingeniously conceived container for living and transporting fish. By means of the special flow wedge, a commercially available oxygen pump (not included in the scope of delivery) produces a one-sided flow of water, which the fish instinctively oppose, without, however, flooding and touching each other unnecessarily. At the same time, the fish are always supplied with sufficient oxygen. Very gentle compared to other methods, fish can also be kept for a long time. Fixed stand by rectangular design, very tight closing double cover. Possibility to connect a second oxygen pump to produce an even stronger flow.