Heard about the fish that cleans shark teeth? Or the frog that lives with a tarantula? Welcome to the weird world of symbiosis where animals form incredible relationships. Macken Murphy introduces his favourite symbiotic relationships and along the way, he explains the cool science behind the baffling behaviour of some animals - from friendly alliances to pesky parasites. You'll even find out about symbiotic relationships including YOU! (Hint - is your head ever itchy?) By the end of the book you won't look at nature in the same way again!