This is the second time I have seen these fish swarming during the day. Heretofore I have seen them on night dives. They are pretty spooky to see in the dark. The writhing mass moves slowly across the coral floor. On this dive the fish were under a ledge but in the open. I used flash anyway to bring out detail and color. They are still spooky during the day. They don’t seem to like me much either.