ichthyophagy noun. 
[ɪkƟɪ'ɒfǝdʒi] M17.[French ichthyophagie from Greek ikhthuophagia fish diet, from ikhthuophagos: see ICHTHYOPHAGOUS, -PHAGY.]The practice of feeding on or eating fish.
 ■   ichthyophagist noun an eater of fish 
E18.  [TahlilGaran] English Dictionary ▲