two copepods — small crustaceans — are positioned on either side of their host's head. Long egg sacs attached at the back of the parasites make it look like the fish is sporting a pair of pig ...

Toxoplasma gondii, a parasite spread by cats, can shred human sperm and may be an overlooked factor in declining male ...

The fly can lay eggs inside the ant’s head. Fly maggots ... Once the ant turned its back on the colony and walked away, it was on a death march. And the parasite was in the driver's seat.

This image captured by a Schmidt Ocean Institute remotely operate vehicle shows parasites had burrowed into the head of a fish in the South Atlantic. Schmidt Ocean Institute video screengrab A ...