The bottlenose dolphins that frequent the Alboran Sea corridor between Estepona and Gibraltar number around 600 individuals, one of the Mediterranean's densest resident populations. The pods feed year-round on mackerel and sardine shoals driven close to shore by the eastward Atlantic current. Marine biologists attribute the concentration to the narrow continental shelf: depths plunge from 30 metres to over 200 within two nautical miles, creating thermal upwellings that sustain the food chain. Estepona's marina, built in 1982 and expanded in 2003, serves as the departure point for dolphin-watching operators licensed by the Junta de Andalucía. Vessels range from twelve-passenger sailboats to forty-seat catamarans, all required to maintain a minimum 60-metre distance from pods under regional marine-protection ordinances enacted in 2018. The regulations also cap engine noise and limit observation time to 30 minutes per encounter. Operators track sightings via a shared digital logbook coordinated by the University of Málaga's marine-research unit. Morning departures between nine and eleven offer the calmest sea states. Easterly Levante winds typically rise after midday, reducing visibility and increasing swell. Skippers favour the stretch between Punta Doncella and the Casares coastline, where depth contours and nutrient flow create predictable foraging zones. Sunset sailings, introduced in 2024, combine dolphin spotting with twilight views of the Sierra Bermeja ridge. Estepona dolphin cruise tours operate daily from Puerto Deportivo, with sailboat and catamaran options departing throughout the day. The Costa del Sol's transparent waters and stable weather windows between April and October deliver sighting rates above 85 per cent, according to operator logs reviewed by the regional environmental authority. Winter months see lower frequency but larger superpods, often exceeding 30 individuals. Hydrophone equipment on newer vessels lets passengers listen to echolocation clicks and social whistles during encounters.