The death of the man, found on a boat in Nelson earlier today, is being treated as suspicious.
The unidentified man was found on a boat, moored in marshland along Queen Elizabeth II Drive in the South Island town, at 10:45 this morning.
Tasman Police are continuing the examination of the scene opposite the skate park and are expected to be there for the next couple of days.
In a statement detective inspector Paul Borrell confirmed the death was thought to be suspicious.
"Police have already had some positive leads from the public, but would still like to hear from anyone who may have information that could help the investigation."