A friend in need is a friend: where cyprinids hide when they need shelter

Friend is known in trouble! This law applies not only to people, but also to the animal world. So, for example, when carapace fish need shelter, they can always count on the help of sea cucumbers. They will hide their comrade for free in a place where no one will find them. Yes, we are talking about the anus of a sea cucumber, which hospitably opens it for its guest. This symbiotic relationship benefits both. The fish gets protection, and the sea cucumber gets... nice company. Everything is a plus.