The Black Lagoon is a Vietnam War era Eco-Class PT Boat that is piloted by Dutch, the boss of the Lagoon Company couriers.
The Black Lagoon is the name of the PT Boat in the Black Lagoon series that was created by Rei Hiroe. The series first began serialization in Shogakukan's Sunday GX magazine on April 19, 2002. It first appeared in Black Lagoon Volume 1 CH. 0 "Black Lagoon", and the anime appearance was in Black Lagoon - Episode 1 "The Black Lagoon".