Porto Conte's Gulf shelters one of the Mediterranean's most studied bottlenose dolphin populations — seventeen resident individuals identified by dorsal notching and catalogued since 2004 by Progetto Natura Sardegna's marine biologists. The gulf's bathymetry creates a natural amphitheatre: a sandy plateau at twenty metres drops sharply to fifty, funneling sardines and anchovies into dense schools that dolphins herd against the limestone cliffs of Capo Caccia. Morning sightings exceed ninety per cent between May and October, when calves born the previous winter surface alongside mothers in the bay's sheltered northwest quadrant. Alghero's dolphin-watching fleet operates under regional ordinance 12/2018, which mandates passive approach protocols — engines cut to idle beyond one hundred metres, no pursuit of retreating animals, maximum fifteen-minute observation windows. Skippers trained in cetacean behaviour hold permits renewed annually by Sardinia's environmental ministry. The boats themselves are rigid inflatables or low-draft catamarans, chosen for manoeuvrability and minimal acoustic footprint. Onboard researchers from the university's marine ecology programme record sighting coordinates, pod composition, and behaviour states — data that feeds into the Pelagos Sanctuary's regional monitoring network. The Alghero dolphin tour departs from Banchina Rafael Catardi, the working quay where trawlers unload at dawn and where the scent of diesel mingles with brine. Tours follow the coastline north past the Punta Giglio lighthouse, a square stone tower visible for twelve nautical miles, then turn west into open water where the seabed falls away and the continental shelf begins. Dolphins surface in arcs — three to five animals moving in formation, exhalations audible as sharp huffs across flat morning calm. Juveniles breach vertically, re-entering with lateral slaps that carry half a kilometre. Adults dive for two to four minutes, resurfacing predictably along vectors the researchers have mapped across two decades of daily patrols. Sardinia's marine mammal protection laws predate the European Habitats Directive by six years. The island's coastal waters were declared a cetacean refuge in 1988, following mass strandings linked to naval sonar exercises in the Tyrrhenian basin. Porto Conte became a voluntary no-take zone in 1997, its Neptune grass meadows recovering to eighty per cent coverage by 2012. The dolphins returned in numbers — census data show the resident pod growing from nine individuals in 2001 to seventeen by 2019, with recruitment stable and no mortality events since 2015.