Exploris Aquarium has appealed for young people behind anti-social behaviour in the area to stop as they are endangering the lives of both local people and its animals.
It comes after a portaloo was set on fire at the premises on Castle Street in Portaferry on Saturday evening.
In a post on Facebook, Exploris said: “It’s time we stop this.
“After over 3 years of anti-social behaviour in exploris it has resulted in danger to lives. Both human and our animals (sic).”
Police were in the area and spoke to a number of young people at the time of the incident.
They are making enquiries into the blaze and have appealed for parents and guardians to warn children against getting involved in anti-social behaviour.
"To young people, we would urge them to think seriously about the impact of their actions," a PSNI spokesperson said.
"Think of the consequences of what might seem like a bit of fun at the time, but what has potentially life changing and long term consequences."
Anyone with information or concerns about anti-social behaviour in the area is asked to contact the PSNI's neighbourhood officers by calling 101.