3. The boat form - which is seen on most rei miro pectorals - alludes to another idea, that sun and moon are like ships sailing upon the celestial waters.

The sky is blue like the sea and at the distant horizon it can be difficult to distinguish where the sea ends and the sky begins.

4. A boat has two ends, inseparable as the phases of the moon. The moon crescents are like rei mua (the figurehead at the bow) and rei muri (the figurehead at the stern).

The two oppositely oriented moon crescents can be imagined as two differently oriented fishes, yet being one: