THIS is the horror moment tourists screamed as their boat filled with water and sunk, killing four.
Crewmembers desperately tried to dish water out of the sinking tourist boat that capsized just off the Galapagos Islands.
The horror incident took place at night when the tourist boat, called the Angy, capsized and sank, killing four, including an American dad.
Another two passengers are reportedly still missing after the boat went down near Tortuga Bay on Santa Cruz Island.
It's understood the dead include a Colombian and an Ecuadorian.
It was claimed that most of the passengers were wearing lifejackets.
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Harrowing footage showed passengers shouting for help as their cabin filled with water.
Another showed a man trying to pump out sea water from the cabin using a flimsy bucket.
Early reports suggested that all three engines on board ran out of fuel midway through the journey and later capsized off the coast of Tortuga Bay.
It was later suggested that strong waves swamped the ship.
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A Navy spokesman said that when the survivors were taken to shore, two crew members, including the captain, fled.
He said poor decision-making by the captain and the crew were likely to blame for the capsizing.
Of the nearly 40 people on board, "most" were not wearing lifejackets according to the Santa Cruz port captain's office.
Video footage shows water lapping around the feet of passengers with none of those visible wearing lifejackets.
Some reports indicated that the capacity of the boat was supposed to be 32 people, which means it was overcapacity.
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The search operation was continuing into the night and the names of those who died of not been released.
The Galapagos Islands are 600 miles off the coast of Ecuador and became famous after being featured extensively in the work of Charles Darwin who based his theory of evolution on many of the animals that he found there.