“I have no idea what this thing is, some sort of a spiny-headed worm or something,” called out Michelle, a technician in the lab. Transfixed by the insidious creature, she zoomed in with the microscope to take a closer look as she described what she saw. “It looks something like a small leech, but instead of a sucker it has a hardened front end with recurved spines.” “Recurved spines?” I thought, sounds nasty! The little monster was a quarter of an inch long, but under the microscope it was clear that this animal meant business. It had clearly been shaped by evolution to do one thing very well: embed itself and never let go.
It was our first day looking through the stomach contents of young Largemouth Bass that we had captured this fall, and I was in the process of training each of the technicians on how to properly dissect the stomachs and identify their contents. I was used to seeing the normal diet items, such as zooplankton, aquatic invertebrates, and small fish, but I had never seen something like this! Continue reading