So, on the plus side: this was classic Futurama -- probably the best of this half-season (with Benderama the only other one really in the running). Good character humor and good sci-fi.
But, Futurama _already did_ a Moby Dick reference episode -- The Day the Earth Stood Stupid. Now, given the events of that episode, Leela can be forgiven for not remembering. But Fry should remember. And more importantly, c'mon, writers.