A 13 hour rave on 17 boats was shut down by police after revellers partied in a protected bay area near Ibiza.
The incident occurred in the nature reserve of the Formentera area, south of Ibiza in the Spanish Balearic Islands as fed-up residents complained about the constant loud music.
Mobile phone footage of the celebrations shows a man showing off his skills as he flies through the air on a flyboard.
Other party-goers can be seen cheering for him while sipping on their drinks.
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According to the Spanish Civil Guard, there were 17 tourist boats moored side by side in the bay, off the coast of Cana Saona in protected waters belonging to the Els Freus Marine Reserve.
The water in the Reserve is home to the world's largest and oldest living creatures including a Posidonia oceanica seaweed plant believed to be more than 100,000 years old.
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Local nature protection service, Seprona, has lodged a formal complaint against the charter company - which is believed to be based in Ibiza - for breaching the rules.
Authorities have warned they will be carrying out regular patrols during the peak summer months and will fine owners of any illegal party boats found in unauthorised areas.
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It is reported that the so-called party boats have been banned in Formentera since 2006 and neighbouring Ibiza is planning on doing the same.
Party-goers or the charter company can face fines of between 6,000 to 450,000 Euros (£5,225 to £392,075) if any damages were found, local media reports.
