After readfing the article is unclear to me why they think that orcas are the culprit necessarily. Clean cuts without damaging pectoral fins?. Killer whales don't make scissor cuts, they crush bones, dismember and literally skin its preys shaking it.
Looks much more like a hidden case of pirate fishing to me. A human's job. Squalene stored in liver is expensive as extra-fine lubricant for machines, having several specialized industrial applications. On the other hand, is not very good as food. If I'm not wrong, shark liver is known to be toxic for mammals.
orcas eating sharks is well known. if i am not mistaken, orca pods off of california and south africa are the main ones we know about. great whites have been observed to leave the area off of south africa when orcas roll in.
Looks much more like a hidden case of pirate fishing to me. A human's job. Squalene stored in liver is expensive as extra-fine lubricant for machines, having several specialized industrial applications. On the other hand, is not very good as food. If I'm not wrong, shark liver is known to be toxic for mammals.