The ornamental design for a marinevessel, as shown and described.
FIG. 1 is a side view from off the right side of the ornamental design for a marine vessel.
FIG. 2 is a top plan view of the ornamental design for a marine vessel.
FIG. 3 is a frontal view facing rearward along the vessel's longitudinal axis of the ornamental design for a marine vessel.
FIG. 4 is a rear view facing forward along the vessel's longitudinal axis of ornamental design for a marine vessel; and,
FIG. 5 is an elevated perspective view facing the right rear-corner, and pointing towards the front right corner of the ornamental design for a marine vessel.