Not my footage so please don't critique, but really interesting - I have never seen or heard of Emperor Angelfish acting as cleaner fish!
https://www.facebook.com/reel/1457512566216158

I could be mis-remembering, but I seem to remember them being involved at a manta ray cleaning station.

1 hour ago, John Liddiard said:

I could be mis-remembering, but I seem to remember them being involved at a manta ray cleaning station.

Ah OK. My memory might be too fuzzy to remember... I'll blame all of those all-nighters on Tuesday nights at Cha Cha's nightclub in Hurghada back in the late 80's / early 90's😀