This is the moment when Hardy the otter delights his trainer by showing off his newly-learned door etiquette.
Hardy can be seen in this footage sliding out of a swimming pool filled with other otters and using his nose to close the door behind him.
His performance receives coos of encouragement and a few fishy treats from Kristyn Plancarte, a marine biologist who used positive reinforcement to train the five-year-old otter at the Vancouver Aquarium in Canada last year.
