It was a reasonably big eel, not the largest I have seen, but large. I stopped to take a couple pictures, even though I have plenty of photos of yellow-margin moray. The yellows are among the friendlier members of the morays, known to play with divers. Undulated morays, on the other hand, are downright nasty, biting at anything that intrudes on their space.
This is too close.
When this fellow comes out to inspect the camera, it is my turn to pull back a bit. True, it is the camera front and foremost, most likely to get nipped. Still, I give the eel a fair amount of respect, a “friendly” eel still possess a substantial bite.