The photo shows a dwarf gobi (Pleurosicya micheli) from Mafia Island/Tansania. It has attached two spirals at its side (I have seen such spirals at these dwarf gobies occasionally aready before). What is it (eggs, parasites)?

Thanks, Wolfgang

Sony A7R5; Sony 90mm f/2.8 macro lens; 1* Backscatter MF-2 flash with snoot; 1/200s; f/20; ISO100.

Edited April 29Apr 29 by Architeuthis

The guides say me allways the same, they are parasites

Parasitic copepod of the family Pennellidae, Cardiodectes sp., possibly Cardiodectes bertrandi. I got the ID from a Facebook group called ID please (Marine creature identification) on a photo of mine I posted there, which is pretty good at getting IDs

I think the spirals are the egg cases of the copepod, not the copepod itself. We have video where you can see blood flowing through the parasite when the fish's heart beats.

Bill