... my true love gave to me 7 eels a swimming.
This is a slow moving 'stream' and may well not be any eels here, but almost certainly will be in the larger stream it feeds.
In Maori the eel is tuna, here's a song for the little geocachers.
Kei hea te tuna? Kei hea te tuna?
Kei roto I te awa! Kei roto I te awa!
Kei hea te tuna? Kei hea te tuna?
Kei raro I te toka! Kei raro I te toka!
Kei hea te tuna? Kei hea te tuna?
Kei roto I te hinaki! Kei roto I te hinaki!
Kei hea te tuna? Kei hea te tuna?
Kei roto I te hangi! Kei roto I te hangi!
Kei hea te tuna? Kei hea te tuna?
Kei roto I te rourou! Kei roto I te rourou!
Kei hea te tuna? Kei hea te tuna?
Kei roto I taku PUKU!
You will need to collect all the codes to find the final.