A Dutch animal rights activist known as the ‘vegan streaker’ has been jailed in Japan for disrupting a dolphin show.

Peter Janssen, 32, and a Belgian woman reported jumped into the Adventure World pool during the show holding a placard protesting at the organised slaughter of hundreds of dolphins near the city of Taiji every year.

Both Janssen and Belgium’s Kirsten De Kimpe were arrested and the show was halted, according to local news website Japan Today. According to Belgian media, both are members of animal rights campaign Vegan Strike Group.

Japanese paper Japan Today said police officers were on alert at the park at the time ‘due to information that foreign activists opposed to dolphin hunting could obstruct the show’.

Janssen, who was arrested in 2008 for releasing 2,500 mink on a fur farm, first hit the headlines in 2007 when he disrupted filming of the Paul de Leeuw tv show, wearing only underpants. That appearance gave rise to his nickname.

He has also been caught streaking at the ABN Amro tennis tournament, a Champions Trophy hockey match and the Tilburg Ten Mile road race. In recent years he has turned his attention to bull fighting and has disrupted at least 22 tournaments.