Smart sea otter closes door at Toba Aquarium

A sea otter at Toba Aquarium is gaining attention for its human-like behavior of closing a door. The otter, named Mei, was filmed by a visitor. The video shows Mei skillfully shutting the door to its enclosure after a trainer gestured. Visitors have praised the otter's intelligence and neatness. Mei is described as a smart and food-motivated otter, sometimes closing the door proactively before being asked, likely to get food faster. The visitor expressed surprise at the video's popularity.