Continuity mistake: When the crew hauls the female orca aboard the boat, the harpoon line is wrapped around her entire body several times. When they cut the rope and drop her into the water, the line is wrapped only around her tail. When the male orca is pushing her at sea, the rope is again wrapped around her entire body.
Continuity mistake: At the end when Orca leaps from the water to land on the ice causing Harris to slide down, the ice isn't there then all of a sudden it appears when Orca lands on it.
Continuity mistake: Sometimes the orca is seen with the nick in his dorsal fin, and sometimes there is no nick. The is most obvious when he sinks the boats in the harbor. When he heads into the harbor, the nick is visible, when he leaves the harbor, there is no nick in the fin.