Looks like a game fish.
The one with the white tail. Sorry for the photo quality.
Snorkeler near the dolphin was not with our group.
4" to 5" long.
Not the best photo....
The long one with the forked tail.
Photographed while snorkeling.
Not the best shot, or angle.
Watched several individuals brave the surf to nibble what they could off the lava as the waves crashed in and out.