It may seem like the idea of animals from different species becoming friends is only something that happens in Disney cartoons, but in reality, there are many examples of unexpected animal relationships in the world.

0000 intro
0014 Gobies and Pistol Shrimp
0130 Manta Ray and Remora
0230 Ravens and Wolves
0325 Sloths and Algae
0417 Hornbills and Mongoose
0535 Leafcutter Ants and Fungi
0623 Clownfish and Sea Anemones