Abstract: A water circulation and filtration device for jellyfish aquarium, designed to be suspended from a top opening of the aquarium and partially submerged in water. It includes a pump house basket and a lid on top. The pump house basket has polygonal shape in horizontal cross sections, and tapered or straight in vertical cross sections. The pump house basket is divided into an intake chamber at the bottom with multiple inlet slits on its sides, a pump house chamber above the intake chamber to accommodate a pump, and a sealed return chamber around the pump house chamber. The sidewall of the pump house basket has a step feature which includes a plurality of flute style outlets disposed along the outside surface of the pump house basket above the inlet slits. The pump draws from the intake chamber and discharges to the return chamber and water is discharged via the outlets.

Abstract: A water circulation and filtration device for jellyfish aquarium, designed to be suspended from a top opening of the aquarium and partially submerged in water. It includes a pump house basket and a lid on top. The pump house basket has polygonal shape in horizontal cross sections, and tapered or straight in vertical cross sections. The pump house basket is divided into an intake chamber at the bottom with multiple inlet slits on its sides, a pump house chamber above the intake chamber to accommodate a pump, and a sealed return chamber around the pump house chamber. The sidewall of the pump house basket has a step feature which includes a plurality of flute style outlets disposed along the outside surface of the pump house basket above the inlet slits. The pump draws from the intake chamber and discharges to the return chamber and water is discharged via the outlets.

Abstract: An aquarium for jellyfish and other plankton species is described. The aquarium has a water container formed by two vertical front facets and a side surface between the front facets, the container having a polygonal, round or other shape when viewed from the front. A sealed chamber is located adjacent the water container with a water inlet that provides water to the chamber. A diffuser block provides a water passage from the sealed chamber to the water container. The diffuser block has a plurality of parallel channels so that water entering the container from the sealed chamber forms a plurality of jet streams along the side surface. This creates a laminar flow of water inside the water container near the side surface, which helps to keep the jellyfish suspended. The water container also has a discharge port covered with a screen to prevent the jellyfish from being sucked out.