Mercurius is a purpose-sunk tug in Recife's artificial wreck park, upright and largely intact with a readable wheelhouse, ducted propeller, and engine-room spaces that give the dive a clear industrial structure from bow to stern. Recife wreck coverage consistently describes it as a fishy wreck rather than a bare hulk, with schools moving around the hull and repeated sightings of nurse sharks, rays, and turtles using the structure as shelter. The site is still a true offshore wreck dive rather than a simple sightseeing stop, because the wreck sits deep enough to reward disciplined bottom time and because the engine-room area creates an overhead-environment decision point. Mercurius works best for divers who enjoy an intact tug profile, want lively marine life on a classic Recife wreck, and are comfortable treating the site as an advanced guided boat dive rather than a casual penetration opportunity.