Police said they were working with the Marine Accident Investigation Branch (MAIB) to establish the full circumstances of the incident, and a report will be sent to the procurator fiscal in due course.
The MAIB said in a statement: ” We have started an investigation into yesterday’s fatal man overboard from the UK registered trawler Copious (LK985) off Sumburgh Head, Shetland, Scotland.
“Sadly, one fisherman lost his life when he fell overboard. The MAIB is investigating the circumstances that led to the accident.”
A fundraising appeal for the family of a fisherman who died after falling overboard near Shetland yesterday raised more than £10,000 within hours.
The appeal was set up by Robie Johnson, who said her friend Joseph Lacaste died in the incident 30 miles south east of Sumburgh in the early hours of Thursday morning.
The fundraiser is looking to raise money for the father of two’s family back home in the Philippines to assist them with mortgage payments, as well as living and travel costs.
The fundraising appeal can be found on Facebook.
Northern Isles MP Alistair Carmichael said it was “also a tragic reminder that fishermen do a dangerous job to put food on our table”.