How High?

While pushing Ethan on the swing that other day, he created his very own measuring system to let me know how high he wanted to be pushed.
Here it is from lowest to highest:
As high as an eel jumps out of the water
As high as a bass fish jumps out of the water
As high as a bluegill jumps out of the water
As high as a dolphin jumps out of the water
As high as a dragon flies