In a Facebook post, Tasmania Police advised North East residents remain aware.

This marks the third shark encounter in Tasmanian waters in four weeks.

In other news:

On July 17, a great white shark pulled a 10-year-old boy from a boat near Stanley - the boy survived with lacerations to his arms, head and chest.

On July 29, a man and his son encountered a great white shark near Tenth Island off Beechford, capturing footage of the nearly four-metre creature splashing close to their boat.