Aphids definitely are not mites. Aphids are soft bodied and have six legs though. In the picture the bugs are pretty big on the leaf, but that may be misleading me. It is hard to tell without a scale. Talonso can you put one of those bugs up against a reference like a dime so we would have an idea of how big they are. Aphids are usually small, the biggest ones I know of are spiny aphids, but your picture may be misleading as to the size of the bugs. When I zoom the picture is too out of focus to make out details on the bugs. If they are smaller than they appear to be they could be black bean aphids as Lindsay suggests.
Aphids are soft bodied, you can squish them with your hands
They leave a sticky residue
Most of them have a cornicle or a little pointy tail.
They can be seen with the naked eye but are small 1/32-1/8 of an inch.
They come in a variety of colors and some may be cottony or woolly with a waxy coating.
They move but not very fast
aphids suck on plant juices heavy feeding can cause the leaves to wilt, pucker, deform and yellow. Leaves under the infested leaves can be coated with black sticky residue (sooty mold)
bigger than aphids
adult bodies can be soft or shell like depending on the beetle
Beetles usually make holes in leaves and larvae will burrow in seed pods.
Happy gardening in Hawaii. Gardens are where people grow.