I'm a marine animal and mammal. I have two stomachs. I sleep with only half of my brain. I’m a super-smart marine mammal known for using clicks and whistles to "talk" and I love to surf, Who am I?

I’ve been here for over 400 million years, can detect electricity, and some of my kind live longer than most countries have existed. I never stop growing teeth. Who am I?

They are mammals. Drinking urine to investigate fertility.‌Their spots are unique.They have dark blue tongues. Who am I?

I sunbathe in silence, show only my eyes above water, and can freeze with just my nose sticking out to breathe. My bite could crush a bowling ball. Who am I?

I breathe air but spend most of my life in a shell. Some of us cross oceans using Earth’s magnetic field, others can breathe through their butts. Who am I?

My heart is car-sized, my food is microscopic, and my haunting voice can cross oceans. Despite my size, I’m incredibly graceful. Who am I?

I carry spots and silence into the jungle, drag prey heavier than myself into trees, and I’m comfortable from cities to savannas. Who am I?

My feathers are brilliantly blue, my bite cracks coconuts, and I bond for life—but once, I nearly vanished from the wild. Who am I?