Namor the Sub-mariner also known as Namor McKenzie is a human mutant and a Atlantean. He possesses a super-strength and aquatic abilities as well as ability of flight along with other superhuman powers.At first he is anti-hero wherein he battles with Avengers but later joined the team.Source here
image sourceHe is a natural leader which has been trained by the royal family of Atlantis. He has been a protector on Atlantis from super villain Tiger Shark.He also have telepathic ability which he can control over sea creatures and also have the ability to copy powers from sea creatures. He moves really fast when at water.Source here