There have been increasing reports of shark attacks on kayaks as more kayaks hit the water. I saw a video of two kayaks swinging at a hammerhead shark as it took a bite out of a kayak on teh east coast I think.
While I am generally ok with the salmon sharks in our waters, the more research I do, I am a bit concerned about ocean kayaking at night with the sleeper sharks around. The more research I do on the sleeper shark, the less "sleepy" they seem...especially at night.
I had not thought about sleeper sharks at night because I am not in the water then. Good point, worth considering.
a very close relative of the Pacific Sleeper Shark, the greenland shark has some interesting "history." I don't believe everything I read on the internet but this seems fairly reliable: http://www.geerg.ca/gshark_1.html
I also know of a Sea Lion tagging study in PWS that transmitted data on things like depth & temp. They had several sea lions killed that didn't fit the temperature and depth profile for a Killer Whale or other known predators. The best explanation was a Sleeper Shark kill. The sensor record an abrupt decline in temperature but it also showed the depth of the probe to be thousands of feet deep at one point when the sensor was expelled and floated to the surface. A whale kill, the temperature drops but not as dramatic (Cold vs warm blooded) and the depth was deeper than killer whales normally dive from what I understand.
Things that make you go hmmmm........