The Shark Lightning is a dark purple speedboat that is actually designed to look like a car. It has a teeth design on the front and flames on the back. The words "Shark Lightning" can be seen on the door.
Role in episode
The Shark Lightning was commonly driven around by The Sharks thoughout the episode with Sharkface being the main driver. Eventually, SpongeBob was able to drive with The Sharks when they accepted him into their group.