The tribe is considered a particularly vulnerable group and reportedly hostile towards outsiders, having attacked almost everyone who has entered their territory.
Caroline Pearce, the director of indigenous rights group Survival International, branded Polyakov's attempt to visit the island as 'reckless and idiotic'.
'This person's actions not only endangered his own life, they put the lives of the entire Sentinelese tribe at risk,' she said in a statement provided to MailOnline.
'It's very well known by now that uncontacted peoples have no immunity to common outside diseases like flu or measles, which could completely wipe them out.'
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It is illegal to have any contact with the tribe and the Indian government said even taking photographs or making videos of aboriginal Andaman tribes would be punishable with imprisonment of up to three years.
[comment] This boy is in a lot of trouble. Three years in prison in India would kill most Western people.