Whitemouth Moray
Also called: Guineafowl Moray, Turkey Moray, Spotted Eel
Scientific name: Gymnothorax meleagris
I have no idea why this eel is called anything else but "whitemouth". After all, it has a white mouth, period. It is quite striking when you come across one, as we were lucky to do in the Maldives.
Snowflake-patched moray
Scientific name: Gymnothorax niphostigmus
Ribbon Eel
Also called: Bernis eel
Scientific name: Gymnothorax funebris
It may not look like one, but the tiny ribbon eel is part of the moray family. Unlike morays, ribbon eels make a burrow in the sand and rarely have more than third of their body out of their hole. Juvenile and female ribbons are solid black, and most curiously of all, the eel changes from male to female as it gets older.
Green Moray
Scientific name: Gymnothorax funebris
Fimbriated Moray
Scientific name: Gymnothorax fimbriatus
Giant Moray
Scientific name: Gymnothorax javanicus
A number of moray species are quite similar, but I believe the black patch near the gills makes this a giant moray. If I'm wrong, please use the contact link below to correct me.
Giant morays can be quite dangerous if provoked, but you really have to provoke them. It's best to just keep your distance, and don't touch, of course.