GENEVA – In a stunning confession that sent shockwaves through the scientific community, the global ocean system has admitted to systematically understating its true depth and volume for at least the past 50 years. The revelation, detailed in a new report, suggests that coastal cities worldwide have been built on a foundation of watery lies.

“Look, it was a young ocean, okay? It wanted to seem approachable, less intimidating,” explained Dr. Coral Reef, a leading oceanographer at the International Hydrographic Organization. “It felt pressured to conform to certain societal expectations of what a ‘manageable’ body of water should be. The pressure was immense.”

The report, which analyzed decades of bathymetric data and tide gauge readings, concluded that the ocean had been employing sophisticated optical illusions and strategic wave patterns to appear shallower. This elaborate charade has led to widespread underestimation of sea level rise, particularly in vulnerable regions like Southeast Asia.

“We’re talking about an entire planet’s worth of water just… playing coy,” said Marina Trench, a spokesperson for the newly formed 'Truth in Tides' advocacy group. “It’s a betrayal of trust. How are we supposed to plan for the future when the very ground beneath our feet, or rather, the water around our cities, is actively misleading us?”

Experts now warn that the ocean's newfound honesty could necessitate a complete re-evaluation of global coastal development, with some suggesting the ocean might just be getting started with its confessions.