Thirteen sharks and more than 300 fish have been moved from Sea Life in Blackpool.
The tourist attraction is saying goodbye to almost 8,000kg of glass. The ten glass panes which make up the ocean tank have been removed for the first time in 23 years.
To get the tank ready to be worked on they have moved 13 sharks, more than 308 fish, 250 bags of gravel, 50 large rocks, and one boat.
More top news
Holding on for Monday. More unsettled from Tuesday
A decent start Monday before some quite unseasonal weather for June arrives by Tuesday
A teenage boy has been arrested on suspicion of the attempted rape of an eight-year-old girl in a park.