Frost fish are a rare find now but used to be plentiful on Whanganui beaches, coastal expert Potonga Neilson says.
Whanganui man Colin Langmead found one washed up on South Beach in late August. It was about 2m long, with a glistening soft skin of brilliant colours.
Though dead, it looked very fresh. He took it home, but didn't try eating it.
He's sorry about that now, because he's read that the fish are very good eating.