Gargantua

Brandon is Jack's curious and fearless son who befriends the baby amphibian. His willingness to engage with the creature and explore the shorelines helps bridge the gap between humans and the mutated wildlife, proving pivotal to a plan that protects the juveniles.

A marine biologist studying seismic impacts, Jack leads the effort to understand the trench-dwelling mutants. He navigates scientific duty, parental concern, and strategic risk as he teams with Alyson Hart to safeguard the creatures.

A local doctor who collaborates with Jack on researching the creatures and coordinating responses. She helps unravel the biology of the mutants and supports the plan to keep the juveniles safe.

Military official in charge of defending the island. He wrestles with orders to attack to protect the population, showing remorse as the island's fate hinges on his decisions.

The matriarchal force who reclaims her offspring, setting off a dangerous chase that tests the limits of human intervention and ecological balance.

A juvenile that Brandon befriends, capable of leaving the ocean and walking on land. Its safety becomes a focal point of the mission to avoid further tragedy on the island.

The bear-sized elder brother whose arrival escalates the threat and triggers the concerted effort to draw the mother away from the shore.