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Just as I was starting to have a crisis over the passage of time, Lyman the jock koala wandered up and asked me to catch a crucian carp for him.

Scientists have known about the peculiar survival abilities of goldfish and their wild relatives, crucian carp, since the 1980s.

There was also a concern that it could lead to interbreeding with native crucian carp.

"It's no wonder then that the crucian carp's cousin, the goldfish, is arguably one of the most resilient pets under human care."