This film is a sci-fi version of "Moby Dick," and when you know that, then you can probably see the ending coming. The description doesn't make it obvious, but we have a space captain obsessively hunting a giant animal, and there is a small plaque of a white whale above his desk. Yep, "Moby Dick."
Why only two stars? It isn't inherently terrible, but:
It's always dark inside the ship. This quickly became annoying: industrial workspaces should be well lit so the workers can see what they're doing, and so the audience can see them do it.
The crew show some needless stupidity, especially towards the end of the film. One of them has gone mad and is roaming the ship with a knife, and the lack of urgency about finding him leads to two deaths.
The film is only 89 minutes. Some films could do with being shorter, but this one could have done with an extra five or ten minutes of people talking about what was happening and why.
On the plus side:
The effects work is good for a straight-to-video film featuring no one I have ever heard of.
The characters are mostly likeable, and believable as the sort of people who would end up at the end of the line.