Snake Island was surrounded by mountains on three sides with a natural port on one side.
The port had been artificially developed and could berth three to five warships. It had long been contested by many pirates. The Narwhal had only been here in recent years. He was originally a modest pirate. However, he rose in fame because he betrayed his past leader. In a few years, he had recruited and suppressed other pirates and robbed his fellow pirates to strengthen his financial resources.
The most important thing for pirates was their own profits. Whoever could lead them to eat and drink would get their support.
Narwhal was able to take control of Snake Island because he had recruited many small pirate groups; which led to him being a famous pirate.
The port in Snake Island was rather crude.