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"The carbon footprint of owning pets such as dogs and cats has been previously calculated, but we have provided the first estimates of carbon dioxide emissions produced from running a tropical aquarium, as well as estimated water consumption."

For the UK, a tropical aquarium produces an estimated 85.3 to 635.2kg of CO2 per year - this equates to 1.6% to 12.4% of the UK annual average household emissions.

The research, the environmental impact of keeping a tropical aquarium in Northern Europe, is published in the Journal of Fish Biology.

A huge tropical aquarium burst in a hotel in downtown Berlin on Friday morning, sending waves of seawater through the lobby and onto the street.

One of these organisms, Ancoracysta twista, was discovered in 2017 on tropical aquarium brain coral by Keeling and others, but it was so weird compared to other microbes that it was considered an "orphan."