Gargantua is an American 1998 giant monster television film, starring Adam Baldwin, Julie Carmen and Emile Hirsch.

A string of mysterious drownings soon turns their research project into a beachfront disaster as Jack learns that a nearby underwater trench is home to a family of giant amphibians that have mutated after prolonged exposure to buried pesticides.

As Jack and local doctor Alyson Hart (Julie Carmen) explore the surrounding ocean for the creatures, the military comes and tries to investigate.

Jack's son, Brandon (Emile Hirsch), discovers and befriends a baby creature that is able to leave the ocean and walk on land.

A more dangerous, bear sized creature responsible for incidents at the beach and implied to be the baby's older brother, also comes ashore and causes a panic before being captured.