Port St Johns Grounds
深度范围指从潜点顶部到通常最大深度；"建议认证等级"是运营商通常要求的主流机构等级，并非法律规定。水流和能见度每天都会变化，请将这里的所有信息视为规划参考范围。
Port St Johns is the sardine run's capital: the shelf narrows here, pushing the migrating shoals, and everything eating them, into a workable band close to the cliffs. June and July mornings start with a launch through the river mouth or surf, then hours of reading gannet flight lines and dolphin spray until a bait ball forms. When one does, swimmers slide in on snorkel first; scuba follows only if the ball stabilizes. Common dolphins arrive in the hundreds, copper sharks carve the sphere, gannets hit like hail, and Bryde's whales end arguments in one lunge. Blank days are part of the honest arithmetic.
您此行的高光时刻: The highest-probability staging area for full bait-ball events
地形地貌: Open shelf water off the Mzimvubu River mouth; action is midwater and surface, not on the seabed
水流: The Agulhas edge, counter-currents, and cold pulses all meet here; every day is read fresh from water temperature and bird behavior.
入水前须知
危险因素: Cold water, long rough days, surf and river-mouth launches, and feeding predators at close quarters: obey the divemaster instantly.
保育: Boats and swimmers work under permit conditions; crews coordinate on the radio so bait balls are not mobbed by every operator at once.
你会遇见谁
"已标注于此"的物种由编辑团队从本页所列来源中整理收录。数量为GBIF出现记录数：即1990年以来在标注位置约5公里范围内记录的观测数据，仅与我们目录中的物种进行匹配。这些数据反映的是该地点的历史目击情况，并非对您此行所见的保证。
摄影师专区
广角: ★★★★★ · 微距: ★☆☆☆☆ (编辑对该潜点适合各类水下摄影风格的1–5分评级)