sea god

from WordNet (r) 3.0 (2006)

sea god
    n 1: a deity that personifies the sea and is usually believed to
         live in or to control the sea

from The Collaborative International Dictionary of English v.0.48

Sea god \Sea" god`\
   A marine deity; a fabulous being supposed to live in, or have
   dominion over, the sea, or some particular sea or part of the
   sea, as Neptune.
   [1913 Webster]