Hannibal Bank
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.
Hannibal Bank is the deep card in Coiba's deck, a seamount rising from serious depths to a plateau that concentrates whatever the Gulf of Chiriqui is moving that week. Upwelling season stacks the odds: whale sharks cruise the bank from roughly December to April, mobulas pass in formation, and schools of scalloped hammerheads work the thermocline below the divers - sometimes rising, often not, and honesty requires saying the bank withholds as readily as it delivers. Amberjack, big cubera snapper, and wahoo bring constant motion regardless. It is a blue-water drift over structure you rarely see, best treated as a hunt rather than a guarantee.
The moment you come for: Seasonal whale sharks, hammerheads below the thermocline, big-fish traffic over a wild bank
Topography: Submerged seamount plateau in open water southwest of Coiba
Current: An offshore bank with real flow; trips run only when weather and operator judgment align.
Know before you splash
Hazards: Current, depth, blue-water ascents, and distance offshore - an expedition-flavored day trip.
Conservation: Within the park's special marine protection zone; commercial fishing pressure at the boundaries remains a live conservation issue.
Nitrox: Worth it here — profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
For photographers
Wide angle: ★★★★★ · Macro: ★☆☆☆☆ — editors' 1–5 rating of what this site gives each style of shooting