On our night dive I swam across this school. They were clustered on the bottom and swam away from my light. The squirming mass was a bit spooky, creepy if you must know. There was something about this closely pack of squirming fish that made me think of eels. They stuck close to the bottom. I would have to say that I don’t recognize them from my daylight dives. Until now I have not seen fish so closely packed like this.