Shaab Samadai — known locally as Dolphin House — is a horseshoe reef system lying fourteen nautical miles southeast of Marsa Alam, where resident pods of spinner dolphins have used the shallow lagoon as a resting ground for decades. The reef earned formal protection in 2004 when Egyptian authorities designated it a marine reserve, limiting daily visitor numbers and dividing the site into three zones: a core sanctuary where human entry is prohibited year-round, a buffer area open to swimming and snorkeling under guide supervision, and an outer perimeter for boat anchorage. The zoning system was modeled on Australian marine park protocols and remains one of the Red Sea's strictest conservation frameworks. Dolphin house marsa alam diving expeditions follow a tightly scheduled rotation managed by the Red Sea Protectorates Authority. Boats depart Marsa Alam harbor between seven and nine in the morning, reaching the reef within ninety minutes. Guides brief passengers on approach protocols — no chasing, no flash photography, no touching — before entry into the designated zone. Spinner dolphins rest in the lagoon during daylight hours after nighttime hunting in deeper water; their tolerance of human presence depends on predictable, low-impact behavior from visitors. The buffer zone's coral gardens support green and hawksbill turtles, Napoleon wrasse, and schools of batfish that drift along the reef wall where it drops from three meters to eighteen. The reef's name originates not from tourism marketing but from generations of Ababda fishermen who observed dolphin behavior here long before recreational diving reached southern Egypt. Spinner dolphins — *Stenella longirostris* — perform acrobatic leaps and spins as part of social bonding, a behavior more commonly observed in the early morning hours before the first tour groups arrive. Current regulations cap daily visitors at two hundred and require all boats to anchor at fixed moorings rather than free-drop, protecting the reef from anchor damage that scarred many Red Sea sites in the nineteen-nineties. Accessibility has improved since the Marsa Alam International Airport expansion in 2019, but the site remains less crowded than northern Red Sea destinations. Most dolphin house marsa alam diving tours include lunch aboard, with return to harbor by mid-afternoon. The National Park conservation fee — nineteen euros per person as of 2026 — funds ranger patrols and mooring maintenance. Water clarity peaks between March and November, when visibility regularly exceeds thirty meters and surface temperatures hold between twenty-four and twenty-nine degrees Celsius, warm enough for extended snorkeling in a shorty wetsuit or rash guard.