One of Ecuador’s  environmentally sensitive Galapagos Islands was hit by a scuba diving boat that sank Saturday.

The boat was carrying about 47 barrels of diesel fuel, leaving a “superficial” slick.

It was first reported by Petroecuador, which did not specify how much fuel was spilled.

The Albatroz was used for scuba diving excursions in the protected waters of the Galapagos Islands, according to Galapagos National Park.

The company said containment booms have been set up around the accident site to control the spill.

The ship’s crew of four is safe.

The park halted tourism around its headquarters in Puerto Ayora.

The Galapagos Islands, 1,000 km (600 miles) off the coast of Ecuador, are a protected wildlife area with unique flora and fauna.

Charles Darwin’s observations on evolution made the archipelago famous.

The Galapagos marine reserve is the world’s second largest. The archipelago, a Natural World Heritage Site, has over 2,900 marine species recorded.

In 2019, a barge carrying a small amount of diesel sank off San Cristobal, causing a minor spill and minor damage.

A vessel carrying 240,000 gallons of fuel sank off San Cristobal in 2001. That spill did harm to several marine species.