The 30 activists from the Greenpeace ship Arctic Sunrise being held by Russia hail from 18 different countries with diverse backgrounds and ages.

Dubbed the "Arctic 30" by the environmental group, those detained range from the veteran captain of the Greenpeace ship Rainbow Warrior bombed in 1985 in New Zealand by French agents, to the great-grandson of a Soviet foreign minister.

Also being held are a 21-year-old Argentinian climber and a freelance Russian photographer working under contract with Greenpeace whose detention had raised concerns about press freedom.

Six of the activists are British and four Russian, with the rest coming from 16 other countries.

What follows is a list of the 30 crew members being held in the northern Russian city of Murmansk pending an investigation into piracy, according to Greenpeace. Their terms of detention have also been confirmed by Russian news sources.

-- Peter Willcox

American, captain of the Arctic Sunrise. Was also captain of the Rainbow Warrior when it was bombed and sunk by the French foreign intelligence service in 1985. To be detained for two months.

-- Denis Sinyakov

Russian, freelance photographer working under contract with Greenpeace who previously worked with AFP and Reuters. His detention has sparked concern over press freedom. To be detained for two months.

-- Dmitri (Dima) Litvinov

Swedish-American dual citizen, Greenpeace spokesman, the great-grandson of Maxim Litvinov, who was Soviet foreign minister for almost a decade under Josef Stalin. To be detained for three days pending new hearing.

-- Sini Saarela

Finnish, activist, one of the two climbers who scaled Gazprom's oil platform in the Barents Sea in the September 18 protest. To be detained for three days pending new hearing.

-- Marco Weber

Swiss, activist, one of the two climbers who scaled the Gazprom platform in the Barents Sea protest. To be detained for two months.

-- Camila Speziale

Argentinian, activist, 21, who had also tried to scale the oil platform but was thwarted by the Russian coastguard. To be detained for two months.

-- Miguel Hernan Perz Orzi

Argentinian, second mate. To be detained for two months.

-- Colin Russell

Australian, radio operator. To be detained for two months.

-- Ana Paula Alminhana Maciel

Brazilian, deckhand. To be detained for three days pending new hearing.

-- Philip Ball

British, activist. To be detained for two months.

-- Kieron Bryan

British videographer. To be detained for two months.

-- Alexandra Harris

British, communications officer. To be detained for two months.

-- Frank Hewetson

British, logistics coordinator. To be detained for three days pending new hearing.

-- Anthony Perrett

British, activist. To be detained for three days pending new hearing.

-- Iain Rogers

British, second engineer. To be detained for two months.

-- Alexandre Paul

Canadian, bosun. To be detained for two months.

-- Paul Ruzycki

Canadian, first mate. To be detained for two months.

-- Faiza Oulahsen

Dutch, campaigner. To be detained for three days pending new hearing.

-- Mannes Ubels

Dutch, chief engineer. To be detained for three days pending new hearing.

-- Anne Mie Roer Jensen

Danish, third mate. To be detained for two months.

-- Francesco Pisanu

French, deckhand. To be detained for two months.

-- Cristian D'Alessandro

Italian, deckhand. To be detained for two months.

-- Jonathon Beauchamp

New Zealand, boat mechanic. To be detained for two months.

-- David John Haussmann

New Zealand, electrician. To be detained for two months.

-- Tomasz Dziemianczuk

Polish, activist. To be detained for two months.

-- Roman Dolgov

Russian, spokesperson. To be detained for two months.

-- Ruslan Yakushev

Ukrainian, cook. To be detained for three days pending new hearing.

Also due to be detained for two months were a Russian communications officer, a Russian doctor and a Turkish volunteer. Greenpeace says it is withholding their names at their own request.