Talking to reporters, Mr Leung said he has been working as a fisherman for more than 20 years and in all that time he has never seen a fish like this before. He said: ‘I suddenly felt my net become really heavy and then I saw the large fish. 'It had a slender head and its whole body looked black with a white belly.’ He held its mouth open and revealed two full rows of fang-like teeth. Mr Leung added because he didn’t know what it was he didn’t dare to eat it for fear of being poisoned.