Humu/en
Mei he Wikipedia
The humu (triggerfish) is a kind of ocean fish (family: balistidae).
The Humu (Coalsack) is also the name of a dark patch in the milkyway, close the constellation of Crux (southern cross). It has the shape of a triggerfish.
In the myth of the both Maʻafu, humu was a fresh water fish, caught by the two boys, and later together with Toloa and the twin themselves placed into the sky.
Even when not in the sky Humu and Toloa are still good friends as in the following trite:
Humu and Toloa plant their plantain plant plant then overgrown with bush. A Fiji dog runs along being welcomed with a shot missed in the leg but hit in the liver It then let out its loud cry.