What is the fastest swimming animal?
Fastest animals
The fastest land animal is the cheetah, which has a recorded speed of 109.4–120.7km/h (68.0–75.0mph).[1] The peregrine falcon is the fastest bird and the fastest member of the animal kingdom with a diving speed of 389km/h (242mph).[2] The fastest animal in the sea is the black marlin, which has a recorded speed of 129km/h (80mph).[3]
Penny Lee Dean
Dean is perhaps best known for her world record for the fastest swim across the English Channel in 1978 in a time of 7:40, shattering the previous record by over 1 h and 5 mins. The record stood for both men and women for until September 1995 when it was lowered to 7:17 by Chad Hundeby, whom she coached. 