Dictionary:

fishgig

  (fĭsh'gĭg')

A pronged instrument for spearing fish.

[Alteration (influenced by FISH) of obsolete fisgig, from Spanish fisga, ultimately from Latin fīxus, fixed. See fix.]

The noun has one meaning:

Meaning #1: an implement with a shaft and barbed point used for catching fish
  Synonyms: spear, gig, fizgig, lance