finny

From fin +‎ -y.

• Rhymes: -ɪni

finny (comparative finnier, superlative finniest)

1. (of a fish) Having one or more fins.
   • 1928, RG&E News, volume 16, page 334:

     The finny trophies he brought back in the form of numerous fat pickerel were ample evidence of his fishermanship.

2. Resembling a fin.
3. Abounding in fishes.
   • 1730–1774, Oliver Goldsmith, Introductory to Switzerland

     Cheerful at morn, he wakes from short repose,

     Breathes the keen air, and carols as he goes;

     With patient angle trolls the finny deep,

     Or drives his venturous ploughshare to the steep;