The skin of the strange animal known as the tachash was used as the outer covering of the tent of the Tabernacle, and to wrap sacred objects used within the Tabernacle for transport. Despite this, no one has a good idea of the creature’s appearance. No one can even confirm that the tachash is a mammal.
Kosher? All animals are bioengineered by G-d. It says so right there in the first paragraph of Genesis. But the beauty of this animal is that its essential nature is so debatable. And you know us Jews, we like to argue.