i think a cheetah can.
Improved answer: actually cheetahs can only run for about 30 seconds i believe its a human :)
sharks
tiger shark
most do but some maynot
Piranna
A dorado
KOMODO dragon
certain species of sea snake
The most dangerous deep sea creature is the Sea Wasp. A deadly jellyfish. The slightest touch of their tentacles creates a permanent rash and horrible pain. Any harder and your toast.
No, the hexproof given by archetype of endurance will prevent your opponent from targeting your creature, however once a creature is enchanted the enchantment no longer targets.
dolphins
single unicellular creature
a Caribbean sea creature