Octonauts & the Ring of Fire

 is a British children and family film directed by Blair Simmons and Qin Zhou. The movie follows the Octonauts who must work together to save their sea creature friends when lava-spewing volcanoes start a chain reaction of disasters across the ocean.

Summary
"When red-hot volcanoes start a chain reaction of disasters across the ocean, the Octonauts must work together to face their biggest challenge yet."

- Official Netflix synopsis

Cast and Characters

 * Simon Greenall
 * Rob Rackstraw
 * Jo Wyatt
 * Paul Buckley
 * Simon Foster
 * Teresa Gallagher
 * Richard Grieve
 * Michael Murphy
 * Paul Panting
 * Keith Wickham