An average kreisel tank housing many moon jellyfish A kreisel tank (kreisel staying German for "spinning leading" or "gyroscope") is definitely an aquarium shaped similar to a horizontal cylinder that is definitely intended to maintain delicate animals for instance jellyfish and newborn seahorses. These aquariums give slow, round drinking water https://www.kylechamber.org/list/member/age-of-aquariums-7585