I don't read Hebrew but it seems to be one word. Strong' Concordance suggests that the Hebrew word is "perhaps of foriegn derivation". Gesenius's Lexicon says "where the Indian fig, or Musa paradisiaca, Germ Paradies=feigenbaum, with large leaves is apparently meant". Musa paradisiaca is in the banana family but I think it's considered more of a plantain.
Ancient writings and traditional translations thereof are not generally a great source of accurate biological data, e.g. whether hyraxes or coneys are unclean and what type of sea creature is chilazon - the source of the blue dye
Tekhelet required for the tzitzit's fringe.
If someone hadn't seen a banana and found an oblong fruit with soft flesh and lots of tiny seeds, they might class it as a fig (especially if they didn't want to introduce a foreign word - and then did Adam and Eve takest of the leaves of the tree-like pseudostem which hast long fruits that groweth in bunches like hands pointing upwards - oh, hell, I'll just say "fig").
I have some
fish in my aquarium that were discovered in Myanmar about two years ago and were thought to be a type of rasbora because they looked similar to another fish that was thought to be a rasbora. They were exported to pet stores everywhere as "galaxy rasboras". After microscopic examination, they were officially declared to be a type of danio (a different sub-family) over a year ago but most are still sold as rasboras. Now, the identity of the other fish is in question as well.
