By Denny Bromley, with William, Elspeth, and Johnathan
Today, Salish Sea Science students were given the rare opportunity to watch the necropsy of a seal pup. The few-day-old pup was called in by someone who had noticed its umbilical cord and placenta still attached, thinking it was an entangled balloon or plastic bag. Assuming they were doing the right thing, they cut off the cord. The seal was brought to rehab to recover from so much human contact, for eventual release back into the wild. Sadly, it passed away. Harbor Seal pups only have a 50% survival rate, and this individual didn’t make the cut. In order to figure out the cause of death to prevent in-care deaths again, FHL performed a necropsy on the animal.

The necropsy began with one of the scientists cutting into the pup’s neck. Folding the flap back, they measured the thickness of the blubber layer to determine how healthy the pup was, and how well it was nursing from its mother. After that, they cut open the seal from chin to pelvis, opening it up into the muscle layer until the ribcage and intestines were visible.

After this, they removed the sternum and cut the ribs off of one side to better access the chest cavity. Then, they began removing and inspecting individual organs. Pieces of its heart, lungs, stomach, intestines, and kidneys were all stored for later research.

Finally, they removed the head from the body and began peeling back the skin and blubber from the skull. They removed one of its eyes and we were able to see it up close.

They finished skinning the head, but rather than enter the cranial cavity on the docks, they took the skull back into the labs to do it there. Thus ended our experience of the necropsy.
After the necropsy, we were given a brief tour of some of the labs at FHL. We saw students working, and even an electron microscope!

Finally, we were given some pamphlets and drove home. Later, students finished up their posters and even printed a few of them.




