On Friday, they started celebrating the start of the weekend by posting humorous reviews of their animals as if they were ordered on Amazon. The lighthearted joke went viral instantly and other animal enthusiasts picked up the trend as well. Soon, zoos, aquariums, wildlife centers and even regular pet owners all over the world were sharing their own witty comments under the hashtag #rateaspecies. Scroll down to see what animals received five-star ratings and don't forget to vote and comment on your favorites!