Ivan, sorry I missed your question.
Kumu is indeed a Hawaiian name. It's a goatfish, usually speared between 2-3 pounds, up to 6 pounds(I've never speared one over 4).
It's Scientific Name is Parupeneus porphyreus and commonly called Whitesaddle Goatfish.
Here's a so-so picture of one in the water. I have some better pictures, but I'm at work, so can't be spending too much time surfing through my files
Great tasting and highly prized food-fish(though I personally give them away), they are rare in highly fished areas esp. in Oahu, the main island.
