Eels

Many cleaner shrimp climbing on and around the eel, eating the dead skin and parasites on the eel,

Their body is as bigger around than my arm

They are very shy, and usually hide back in the sand when approached

Babylon Wall

Juvenile.  The body turns blue as an adult, the yellow ribbon remains

No, it is not trying to bite, that is how they breath

At Coral Garden.  Some think this is a honeycomb eel, but does not look like the ones I have seen

I apologize the focus is not sharp enough.