10 minutes ago, FauxPas said:the Spanish term 'tuna' refers to the fruit of an edible cactus. So, if you want to differentiate, you add the 'fish' on to the end.
Yes, that too. The cactus meaning is much older (16th century) than the fish name is in English and, unlike the fish name, is derived from Haitian. The fish name is via Spanish, too but ultimately from Latin.