Researchers recorded an incredible variety of freeform songs over a four year period.
The incident took place on December 2, 2016 off the coast of Vancouver Island, British Columbia.
The 5.2 meter-long reptile was discovered floating down a river in Queensland.
Scientists could predict how quickly a pair of prairie voles would start getting close to each other and suggest the study could have applications for human bonding.
After oxytocin injections, seals were friendlier and displayed far less aggressive behavior than would usually be seen among strangers.