The name of this odious unauthorized tenant is Defensive Thought Bubble
Parasites that are mainly parasitic in natural defense
The higher the water temperature, the stronger the fertility
Found a lot in summer defense
I eat a lot of yellowtail in the winter
It is often seen in winter defense 
Since it’s not toxic, there’s no problem with the body even if you don’t know
I heard there’s a YouTube video of you eating defensive worms yourself 
List of other harmless marine parasites 
SOURCE Mermaid Pirate Group 
You have to defend yourself