Alvarenga is an offshore Pernambuco wreck locally tied to the Comandante Alvarenga and Batelao do Norte names, resting as a semi-intact iron hull on sand off the Recife-Olinda coast. The dive is less about coral cover and more about reading the wreck shape itself, with open-water blue around the hull and passing schools of fish and rays using the structure as shelter. Because the site sits fully offshore in Recife's wreck circuit, it is normally treated as an advanced boat dive planned around sea state, descent control, and the day's visibility. Divers usually come here for the historic hull profile, the sense of open-water exposure, and the chance of seeing schooling life concentrated around a relatively isolated wreck footprint.