Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the Mustelidae family, which also includes weasels, badgers, honey badgers, martens, minks, polecats, and wolverines. Strong high-quality puzzle pieces. Made from recycled blue board paper and printed with vegetable based ink. Made in USA. This superior quality puzzle will delight and educate all at the same time.