2) If you have to choose a fish and a bird:
I think fish is a kind of flying fish (ray), which can jump out of the water for more than ten meters, stay in the air for more than 40 seconds, and fly for more than 400 meters.
I think the bird is the golden pheasant in North America, which has the longest flight time. The golden pheasant flew for 35 hours at a speed of 90 km/h and crossed more than 2,000 km of sea.
3) The source is: Song Ruan read 30 ancient and modern poems in the Collection of Poems before the Turtle, saying that during the Great Calendar of the Tang Dynasty, Yuan Lan, a Buddhist monk, wrote a poem on bamboo slips: "The sea jumps from the fish and the birds fly from the sky." This poem expresses the free and broad mind and lively Zen machine of Zen monks. Later, it was changed to "the sea is wide and the fish jumps, and the sky is high and birds fly", which means that you can move freely or display your talents freely.