Green or yellow morays may look fearsome but they are not considered dangerous to humans. It's a different matter if you're a small fish or invertebrate. I watched this moray for some time; it swayed slightly in the entrance of it's lair, perhaps in order to look like a piece of kelp, then every now and then it would strike the sand with a sideways blow. On closer inspection it appeared to be catching small prey items that passed by it's hole
