What is the scientific name of an tuna fish?

There isn't one single scientific name for "tuna fish". Tuna is a common name for a group of fish belonging to the tribe Thunnini, which is within the family Scombridae.

Here are some examples of common tuna species and their scientific names:

* Albacore Tuna: *Thunnus alalunga*

* Atlantic Bluefin Tuna: *Thunnus thynnus*

* Yellowfin Tuna: *Thunnus albacares*

* Skipjack Tuna: *Katsuwonus pelamis*

* Bigeye Tuna: *Thunnus obesus*

So, it depends on which specific type of tuna you're interested in.