What's the Kennection? #329

What kind of animal moves so slowly that algae grows on its fur, providing camouflage and food?

2. What spice is the primary flavoring for horchata?

3. What island in the Gulf of Alaska is America's second largest, after the "Big Island" of Hawaii?

4. Cartesian coordinates are normally labeled as 'x' and 'y'. What kind of coordinates are given as 'r' and an angle called phi or theta?

By what nickname was California mountain man James Capen Adams better known?

What's the "Kennection"?