Here's a unique way to mark the Fourth of July holiday at Cape Cod National Seashore: Take in a showing of the 1975 classic movie "Jaws," and go over shark safety guidelines for enjoying the seashore.

The seashore will show the film, which depicts the fictional tale of a great white shark’s terrifying impact on a New England tourist town, on July 4 at the Salt Pond Visitor Center. Before the movie, test your knowledge of shark “fact vs. fiction” and learn about the important ecological role sharks play in the marine ecosystem. Safety tips for recreating in Cape Cod waters will also be shared. The program will run from 7 to 9:30 p.m. in the indoor auditorium at Salt Pond Visitor Center in Eastham. The program is free and accessible.

Recently, Cape Cod's great white sharks and gray seals have gained local and national attention. Both species existed long before Cape Cod was settled or became a popular destination, and in recent years, their numbers have increased. Sharks have existed for more than 400 million years, according to the Park Service. As top predators, sharks are critical for maintaining a healthy and balanced marine ecosystem. 

Seals are the major prey species for the great white shark, and as the seal population increases, the great white sharks have become more numerous. There have been confirmed reports of great white sharks feeding on seals close to shore at the Cape, as well as great white shark sightings from spotter planes flying along the Outer Cape and near swimming beaches. While it is rare for a great white shark to bite a human, it did occur in Truro in 2012.

To stay safe and to protect wildlife:

• Do not swim near seals.
• Swim close to shore, where your feet can touch the bottom.
• Swim, paddle, kayak, and surf in groups.
• Do not swim alone in the ocean at dawn or dusk. Avoid isolation.
• Limit splashing and do not wear shiny jewelry.
• Follow instructions of lifeguards. Become familiar with the beach flag warning system. Take time to read signage at the beaches.

The national seashore, the towns of Cape Cod and the Islands, the Massachusetts Shark Research Program, and the Atlantic White Shark Conservancy have worked together to produce shark advisory signs for beaches and brochures that provide education and safety tips for beach users.

Although “Jaws” caused many people to fear sharks, the film also serves as a catalyst for sparking further discussion to build interest and understanding in these misunderstood creatures. The “man-eaters” of the movies are fictional, but the real-life sharks of Cape Cod are intriguing and command respect. “Jaws” is rated PG for mature thematic content including frightening, intense scenes; profanity; and suggestive material and references. Doors open at 6:30 p.m., and seating is limited and on a first-come, first-served basis.