RED

Imperial shrimps are often found on various nudibranchs and holothurians. You can often see this for example in the Philippines or Indonesia. But in the Red Sea such a meeting is more than rare. I found this shrimp on a Spanish dancer at the very end of a night dive. I shoot this pair off to the last breath)

Spanish dancer (Hexabranchus sanguineus).
And he has one property, which formed the basis of the name. He can dance. Most often it can be seen at night, in the light of a lantern. In the thickness of the water the mollusk begins to bend and turn around the most intricate trajectories. Given its bright coloration (most often red or orange) it's very beautiful.

The most difficult thing was to take off the shrimp on the dancing dancer. For comparison, I can suggest an analogy - this is how to shoot a fly sitting on a fluttering butterfly.