This is the heartwarming moment a walker rescued fish that were stuck under the ice in a frozen lake .<br /> <br />Andreas Petersen noticed the school of perch trapped in the shallow, rocky water below the hardened ice surface of the lake in Gavle, Sweden.<br /> <br />The nature lover rushed home to grab a small claw hammer to break the ice and free the five stuck fish.<br /> <br />The creatures started wiggling when he smashed the ice, which allowed them to move again. In under a minute, they were able to dart away into the warmer depths of the lake.<br /> <br />Andreas made the caring rescue in January this year when temperatures plunged below zero but footage only emerged this month when he published it online for the first time.<br /> <br />Andreas said: "I rescued the fish while they are small but when they get bigger, maybe I will catch them again when I'm fishing.<br /> <br />''I'm happy because I was able to do something so simple to save them.''<br /> <br />Much like bears and other hibernating animals, some fish are able to shut down basic bodily functions, slow their metabolism, and enter a dormant state so they can survive when still water freezes.<br /> <br />This means that they mights have survived in lake until it started to melt, even if Andreas did not rescue them.
