How many ships sail in the forest?

Shopping in Waitrose this morning I saw on the fish counter "New Forest Barramundi" and had images of them bothering the ponies. shewhomust reminded me of the folk song The Week Before Easter and its verse:

The men in yon forest they are asking me
How many wild strawberries grow in the salt-sea
And I answer them back with a tear in my eye
How many ships sail in the forest.

The truth is odder still as it's literally true; New Forest Barramundi are produced by the Aquabella Group: "We have one of the world's largest on-shore, indoor fish farms to rear the fantastic eating-fish Barramundi. The facility is located in the UK’s New Forest, just above the south coast near Lymington."