Yes, the fish indicate when the fishing is good on the Coromandel Peninsular (the thin sticky up bit of the North Island) based on the phases of the moon. A whole fish represents good fishing and a half fish represents fair fishing. Although they are based at Puriri, eight miles south of the peninsular, they service most of it.
Because New Zealand is a small place.... Thirty years ago my uncle and aunt lived in Puriri and my uncle occasionally worked for Graeme Wright Transport as a relief driver.
The photo was taken in February 2020 of a group of trucks approaching the inaugural Bombay Truck Show. This truck show was organised by a small local transport company as there hadn't been a truck show in the North Island for at least five years. They decided to hold a small show as a fundraiser for the local school, rugby club and St Johns, with a hundred trucks on the local rugby club fields. Once it was announced places filled within a few days. Then Sutherlands, the market gardeners that backed on to the rugby club, offered to put the a couple of paddocks of broccoli into grass once they were harvested so there was extra room. This allowed the number of entries to increased to 275, on the day there were 280.
Entry was by gold coin donation, NZ$1 and $2 are a gold coloured coin, when they opened the collection cans most of them contained at least one $50 note. There were six to eight thousand people through the gates. Between the gate take and $50 a truck they raised over $68,000. The local school is the primary school I went to. I have given this photo to the organisers to use.