There has still been no sign of a Tasmanian traveller's beloved dog after it was reported missing on the Spirit of Tasmania on Tuesday.
Holly Alexander boarded the Spirit with her dog, Ester, on Monday evening, heading to the mainland with the intention of moving to Tweed Heads in NSW.
The woman said she was woken at midnight by a security guard and told that her dog had escaped and could not be found.
"They would only let me look for an hour and I waited in the bar as they kept looking," she wrote in a Facebook post, desperately begging people to keep an eye out.
"They couldn't find her, they didn't raise any alarms when they were trying to get people to disembark or check their cars as they seem to think that she might of jumped in the utes or trailers."
"She is my best friend and I just want her back. Not knowing if she's dead or alive is killing me. Please help."
Ms Alexander said she had not been able to stop crying and had been unable to sleep since Ester went missing.
A Spirit of Tasmania spokesman confirmed the incident on Tuesday.
"Spirit of Tasmania is working closely with the owner and supporting her efforts to locate Ester."
The last widely reported incident involving a dog happened nearly two years ago, when a tourist's pet dog died below deck.
TT-Line at the time confirmed it was the second dog death in eight years.