Tufted puffins who dive up to 100 feet below the surface. Black oystercatchers, who don’t quite live up to their names. Long-billed curlews, who most certainly do! Select this category to meet some of the fascinating bird species in our care at the Aquarium.

Whether they live in colder or warmer waters, all fish share some key similarities. They’re vertebrates, which means they have backbones. And they’re cold-blooded, which means their internal body temperature changes according to the temperature around them. Select this category to learn about some of the amazing fish species at the Seattle Aquarium.

What’s an invertebrate? An animal without a backbone—in fact, an animal without any bones at all! Select this category for a dip into the intriguing array of invertebrates that you’ll find throughout the Aquarium’s habitats: spiky sea urchins, sticky anemones, soft sea cucumbers, luminous moon jellies and more.

Can you tell the difference between a sea otter and river otter? How about a harbor seal and a fur seal? Visit these pages to expand your knowledge about the similarities—and differences—between the four marine mammal species in our care at the Seattle Aquarium.