It's not a farmed fish escape you're used to hearing about, but one Norwegian firm reported a devastating escape Tuesday, according to the Norwegian Fisheries Directorate.

Halibut farmer Tubilah lost 50,000 halibut from its Bomlo, Norway, operations.

The fish weighed an average of 1.5 kilograms.

The directorate said it was the first time the country had seen an escape of this size, and is seeking expert input on how best to react.