The species, which was only discovered recently, have cat-like claws rather than suckers on its arms.
The system is now ready to be operational.
"It's hard to avoid volcanoes in New Zealand."
The couple claims Royal Caribbean withheld key information.
The stories of hope and survival provide comfort, although the pain lingers on.
"It is not just about the tours, it is about the town and the community."
"The scale was something beyond what we had seen."
"Everyone was covered in ash... everything was grey."
A lawyer said the value of the lawsuit would depend on the individual cases of the plaintiffs.