- Steven Spielberg originally hired local anglers to catch a shark to pose as the "wrong shark" hung on the dock. All they landed were blue sharks and threshers too small to fit the bill, so a giant dead tiger shark was shipped in on ice from Florida.
- Remember the black Lab, Pipit, that was playing fetch in the water until she disappeared? She was chosen for the part because of her extensive training as a waterfowl retriever.
- The extra-loud clicker on the Penn reel Quint uses was specially tweaked by original owner Lynn Murphy, who wanted a reel that would tick loudly from even the slightest bump of the bait while swordfishing.