Mega Shark vs. Giant Octopus

Lorenzo Lamas

Allan Baxter

Debbie Gibson

Emma MacNeil

Sean Lawlor

Lamar Sanders

Vic Chao

Seiji Shimada

Jonathan Nation

Vince

Mark Hengst

Dick Ritchie

Michael Teh

Takeo

Chris Haley

Kenji

Dustin Harnish

Helmsman

Dean Kreyling

U.S. Sub Captain

Stephen Blackehart

U.S. Sub Sonar Chief

Dana DiMatteo

Marine Biologist

Myles Cranford

Deputy

Dana Healey

Naval Officer

John Bolen

Weapons Officer

Russ Kingston

Admiral Scott

Larry Wang Parrish

Japanese Typhoon Captain

Stephanie Gernhauser

Sub Commander

Cooper Harris

Sonar Tech

Matt Lagan

Destroyer Captain

Hunter Ives

Destroyer Sonar Man

Douglas N. Hachiya

Destroyer Sonar Tech

Sergio Kato

FBI Agent (uncredited)

Aki Hiro

Typhoon Navigator