One of the great benefits of living so near the ocean is that every once in a while, something really cool washes ashore. Such was the case last week when a resident of Malcolm island found a dead Pacific sleeper shark on her doorstep.Well, by the time she found it, it actually looked a bit more like this:
(I must warn you that that the pictures don't get any less graphic from here on in)I had the opportunity to take some measurements and samples for a fisheries scientist who studies sharks. Having never dissected a shark, I soon found it was unlike anything I had ever seen up close before.
It was about nine feet long, though I later found that sleepers can grow to over 14 feet. It also had incredibly thick muscles along the spine for propelling the shark forward with powerful strokes of its tail.
Unlike most groups of fish, sharks have no swim bladders and must swim continuously to keep from sinking. Their skeleton is made entirely of cartilage, which is much lighter than bone. But this is not the only advantage the shark possesses for staying afloat.
