Police officers discovered a shark-infested pool with a Christmas tree in the centre while responding to a report of a disturbance.
Police state that they were called to the ground floor flat on October 8 and were astonished to find the makeshift 8ft aquarium in the living room.
The aquarium, based in a property in Haywards Heath, Sussex, had an artificial Christmas tree in the middle which the fish were swimming around, reports The Mirror.
It is unknown whether or not the predatory pets, who the owners had no real reason for having, were the cause of the disturbance.
Police are intending to speak to the housing association to see if the tenancy agreement allows for the toothy tenants to live there.
Mid Sussex Neighbourhood Policing Inspector Darren Taylor, of Sussex Police, was shark-ed to hear what his team found.
He wrote on Twitter : "Just when you think you have heard it all! Team attended a premises over the weekend, only to discover a 8ft swimming pool in the front room.
"In the swimming pool (apart from water) were small sharks swimming around and an artificial Christmas tree in the middle! I kid you not!"
One of his social media followers replied: "We're gonna need a bigger bauble," in reference to the iconic line from 1975 film Jaws.
John Lawrence said: "I bet their "Jaws" dropped when they saw that."
Another follower, named Ann, replied: "Was there any people there or were they breakfast.
Deanna Pennington commented: "Please tell me someone started up the chorus for Baby Shark."
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