I can find nothing in the FAR's that would prohibit this operation assuming you do not have airspace violations.
91.119 (d) Helicopters. Helicopters may be operated at less than the minimums prescribed in paragraph (b) or (c) of this section if the operation is conducted without hazard to persons or property on the surface. In addition, each person operating a helicopter shall comply with any routes or altitudes specifically prescribed for helicopters by the Administrator.
Unless shamu was under the helicopter and assuming they were not violating route or airspace minimums, this is perfectly legal.
