The Collaborative International Dictionary of English v.0.48:
Surf \Surf\, n. [Formerly spelled suffe, and probably the same
word as E. sough.]
The swell of the sea which breaks upon the shore, esp. upon a
Surf bird (Zool.), a ploverlike bird of the genus
Aphriza, allied to the turnstone.
Surf clam (Zool.), a large clam living on the open coast,
especially Mactra solidissima (syn. Spisula
solidissima). See Mactra.
Surf duck (Zool.), any one of several species of sea ducks
of the genus Oidemia, especially Oidemia
percpicillata; -- called also surf scoter. See the Note
Surf fish (Zool.), any one of numerous species of
California embiotocoid fishes. See Embiotocoid.
Surf smelt. (Zool.) See Smelt.
Surf whiting. (Zool.) See under Whiting.