The Collaborative International Dictionary of English v.0.48:

oceanographer \oceanographer\ n.
   A scientist who studies physical and biological aspects of
   the seas.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

oceanographer
    n 1: a scientist who studies physical and biological aspects of
         the seas

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "oceanographer":
   appraiser, assayer, assessor, cartographer, chorographer,
   estimator, evaluator, gauger, geodesist, hydrographer,
   land surveyor, measurer, meter, surveyor, thalassographer,
   topographer, valuator, valuer