There are two different endings to this movie. In the first one (released on video and DVD in the US), the shark (inexplicably) explodes after being rammed by the boat and sinks to the bottom in a reuse of footage from "Jaws." When the camera cuts back to the survivors floating in the water, we see that Mario Van Peebles, though badly wounded, is alive after all. In the second ending (which can be seen on American Movie Classics in the US), Mario Van Peebles does not survive his fall off of the boat; when he falls, he lands in the shark's mouth and is killed. Also, when the boat rams into the shark, it does not explode but is more "realistically" impaled, blood pouring from its mouth as it dies. After the survivors are knocked off the boat, there is a shot of ship and shark sinking to the bottom, prow of the ship stuck in the side of the shark.

In the third film Michael Brody did a whole lot of welding and dated a marine biologist. In this film he is studying to be a marine biologist and his wife does a lot of welding.

The woman who greets Thea and makes her food when Michael and his family arrive in Amity is Mrs. Kitner, mother to the second victim in the original "Jaws".