Gulf of Batabanó, Cuba
The Gulf of Batabanó (Spanish: Golfo de Batabanó) is an inlet or strait off southwestern Cuba in the Caribbean Sea.
It separates mainland Cuba from the Isle of Youth (Isla de la Juventud) and contains about 350 smaller islands of the Canarreos Archipelago (el Archipiélago de los Canarreos).
The gulf’s northern border is about 80 miles (130km) long, stretching from the southwestern tip of Cuba to the Zapata Peninsula (Península de Zapata). It reaches south about 50 miles (80 km) to the Isle of Youth.
The gulf is shallow–less than 200 feet (61 m) deep. This is part of the reason why the gulf appears light blue, whereas the surrounding sea is quite dark.
Other parts of the gulf, particularly near the islands, appear light blue-green, due to phytoplankton.
Light brown sediments are also visible along the coastline of the mainland and around the islands.
The northeastern section of the gulf, called Ensenada de la Broa, is dark green in color, due to an algal bloom.
This intense coloration of the water throughout the gulf helps show the movement of the currents.