Fish of Darkness

Fish of Darkness was a Mysterious Being from Road to Hero.

Personality
Not much is known about it.

History
He got beat up by Saitama for a reward.

Physical Abilities
Enhanced Speed: Fish of Darkness is fairly fast. He is a able to attack with his whip in rapid succession.

Equipment
Whip: Fish of Darkness uses a whip. He is fairly skilled with it as he was able to give Saitama a hard time, but it should be noted that Saitama was still fairly weak at this time.

Trivia

 * Fish of Darkness is the first mysterious being to be shown to naturally transform from a human.