BT AZ 39a(22) :חמארא דימא שרי, תורא דימא אסיר‏ : the "sea-ass" is permitted, the "sea-ox" is not
See the entire entry for ḥmārā dmayyā n.m. name of a fish

BT AZ 39a(22) :
See the entire entry for tōr, tawrā n.m. ox, cow