Unalaska, AK – A 59-foot longliner sank at the Delta Western fuel dock early today, for reasons still unknown.

The F/V Zenith started to rapidly take in water just before 7am. The owner of the vessel and all fishermen on board managed to exit the boat safely, according to harbor officer Tim Mahoney.

"The crew stated that from the time they got the alarm that it sank in literally seconds," says Mahoney. "So they were very fortunate to all get off alive. I think the only casualty was a cat."

The Coast Guard is currently investigating the cause of the sinking.

The Zenith was capable of carrying over 4,000 gallons of fuel, but it only had about 3,000 gallons on board, according to Coast Guard federal on-scene coordinator Jason Munoz. He says that most of that has been contained, and clean-up operations are currently underway.

"There is a visible sheen around the vessel," says Munoz. "Delta Western was proactive and put some containment boom around it right after the vessel began sinking."

Magone Marine Services is currently working on salvage and is expected to have the vessel lifted by tomorrow.

The Zenith is registered in Sitka, and a sister vessel to the longliner Ocean Harvester, which went adrift in Captains Bay and nearly grounded earlier this month.