What can you get from Penguin Provisions? Well, they have a wide variety of fish, but their biggest seller is their teal blackchin. This fish is a small,but powerful, saltwater fish that is great for aquariums and can be found in most parts of the world. They are a Mytilus teal, which means they are a species of the Mytilus genus. These fish are small and have a black chin, which is a marking that is used