My escort

This Thysanostoma thysanura Jellyfish can be variable, some with the long tentacles and some without.
This particular one has a bell of around 10cm and the tentacles was around 25-30 cm long.
It was floating with the surface current, just one and was accompanied by a Filefish and a Jack (not in the picture).
It is very common for some Jellyfishes, especially the bigger ones to become 'host' or shelter for juvenile fishes and sometimes even shrimps and crabs.