Fish living at the National Sea Life Centre in Birmingham have survived a power cut that left their tanks dangerously cold for almost 24 hours.
Managers at the centre were very worried the creatures would start dying as their water temperature plummeted.
Luckily, the electricity was fixed early on Sunday morning before any of the sea life died from the cold.
All day on Saturday workers battled to keep the animals as warm as possible using heat from gas boilers.
As well as tropical fish, several giant Hawaiian turtles and black tipped sharks were also at risk.
The power cut happened in the early hours of Saturday morning and more than 8,500 businesses and homes in Birmingham lost their electricity supply.
Most buildings were reconnected by Saturday afternoon.
A spokesperson for the electricity company said it was "unfortunate" that it was just down to the centre's location on the electricity network that left it cut off for so long.