An endangered Yangtze finless porpoise was spotted spouting water while swimming on its back in eastern China.

The cute moment was filmed in the city of Yangzhou in Jiangsu Province on February 26.

According to Ma Jianjun, an assistant to the president of the Yangzhou Finless Porpoise Conservation Association, this porpoise was particularly active and different from what they normally see.

According to experts, there are two reasons why finless porpoises spit water. One is that the porpoises play to entertain themselves and the other reason is that they spit water columns at small fish jumping out of the water to drive them away and facilitate their own hunting.

The Yangtze finless porpoises are critically endangered as there are less than 2,000 remaining, of which 100 live in semi-natural reserves, according to WWF.

The video was provided by local media with permission.

2月26日下午1点多，江苏扬州市江豚保护协会江豚观测员，在长江扬州段三江营水域常态化观测中，拍到江豚吐水的场景。江豚一边仰泳一边吐水柱，调皮的模样，十分惹人喜爱。
扬州市江豚保护协会会长助理马建军介绍，和以往观测到的江豚场景不一样，这头江豚特别活跃。往常看到的，都是江豚一跃出水再潜入水中，短时间内再次出水……他没想到这头江豚竟会吐水柱，吐完潜下去，跃出水面再吐……这样的场景持续了一会儿后，江豚游出了无人机镜头观测区域。
扬州市江豚保护协会会长陈瑞金表示，他们请教了中科院水生所的江豚保护专家。据专家介绍，江豚确实有这样的习性。吐水可能有两个原因，一个就是江豚自娱自乐地玩耍，比如觅食后水中嬉戏自我娱乐；另一个就是它们在朝跳出水面的小鱼吐水柱，通过吐水柱来驱赶鱼便于自己捕食。