The whale shark (scientific name: Rhincodon typus) is the largest member of the shark family and also the largest fish of the seas, can reach up to 18+ meters (60+ feet) in length, but this species is harmless to humans.
The lifespan of trees varies greatly. Almost all trees outlive us, humans, and some of them can reach very old age (thousands of years!) depending on their species. Here is a list of the oldest trees in the world.