Killer whales might be able to eat them, Watanabe suspects, but Greenland sharks usually stay within deep water that killer whales do not frequent.

MSN: Presenting the world's slowest shark - Technology & science - Science - DiscoveryNews.com | NBC News

The waters also support the UK's only resident population of killer whales and two feeding and breeding hotspots for basking sharks, the world's second biggest fish.

BBC: West coast whales, dolphins and sharks to be surveyed