A doctor originally from Swansea, Wales has gone missing in New Zealand.
David Holland, 31, vanished on Friday, 11 March after telling friends that he was going for a swim at a beach near his home in Tauranga on North Island.
Police said he then failed to turn up for work, which was out of character.
Volunteers have been helping search for him, and more than £11,000 has been raised to help his family. Police said they are concerned for his welfare.
Friend Dean Ella, from London, has set up a fundraising page.
He said: “David is a wonderful person. His friends, family and colleagues love him for being kind-hearted, endlessly thoughtful and funny.
“He is active and outdoorsy and is a keen cyclist, swimmer, hiker, ultimate frisbee player and an excellent swing dancer.
“It is due to this warm, open, adventurous personality that David has friends from all over the world and all walks of life that are looking for ways to help.”
Mr Ella said Mr Holland’s family has flown to New Zealand to help with the search.