The fictitious name of one of the doctors is "Caroline Munro", the name of the actress who was a "Bond girl" in "The Spy Who Loved Me", where the villain operates from an underwater base and feeds the sharks with their enemies and the thug on duty is called "Jaws".
It seems obvious that the character "Dr. Roy Shaw" was named for Roy Scheider and Robert Shaw, both stars of "Jaws". One could also suggest that the "Dr." is a reference to Richard Dreyfus's character, also in "Jaws".
The movie is part of the notorious german "SchleFaZ" series. Thus it was aired December 2020 on german TV station Tele5. ("SchleFaZ" is a german abbreviation, means "the worst films ever".) In that series 2 hosts present the whole flick - and make fun of it throughout the movie.
Toward the end of the movie the survivors in Plantet of the Sharks see the iconic arm of the Statue of Liberty rising out of the water. Eerily similar to the ending of the original Planet of the Apes.
The character Hideo Ishiro is portrayed by actor John B. Swart who does not look even slightly Japanese. One wonders why they didn't hire a Japanese actor or change the name of the character. At least he wields an Oriental sword towards the end of the movie. This is the only justification for his name.