The Caribbean Gulf/Basin natural water/ocean, the greatest depth is23,000 feet in the Cayman trench. Islands islands in open Atlantic are insufficient depth to permit intermixing of anything, and the water movement is slow compared to to other oceans. The current is not the same as other ocean ( like Pacific).The circulation of oxygen is impaired in the Carribean sea, which causes nutrient dearth for marine communities in the Atlantic Oceans

thus deficiency in the Panama Canal Atlantic Ocean.