A splice system for linear connection of fishing lines includes a female connector and a male connector. Each connector has first and second opposite ends, a longitudinal axis, and a shaped exterior surface. The first end of the female connector is connected to a first fishing line section; the second end has a first opening; and the connector has a raised interior feature. The second end of the male connector is connected to a second fishing line section; the first end is configured for coaxial insertion into the first opening of the female connector, and the first end has a raised exterior feature. The connectors have a first relative position representing a disengaged state and a second relative position representing an engaged state. The first relative position and the second relative position are rotationally displaced about the axis.