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GeekyRedhead
Opening scenes are aliens in outer space. 15 mins. later, time passing, nothing happening. Looks very cheaply made, as well.
An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.