Argyrosomus japonicus

Argyrosomus japonicus is a silvery to bronze-green colored fish which may grow up to 2 m in length. It is known as mulloway or jewfish in Australia and dusky Kob in South Africa. The name jewfish refers to the large earstones, which are prized as “jewels” by some fishers.
A. japonicus is a member of the Sciaenidae family, and has an Indo-Pacific distribution occurring in coastal waters surrounding Australia, Africa, India, Pakistan, China, Korea and Japan.

There is also a town called Jewfish in Florida.

Jewfish is an unincorporated community in Monroe County, Florida, United States. It is located in the upper Florida Keys on Key Largo off of U.S. Route 1 (Overseas Highway). It is just west of the CDP of North Key Largo.
It has a hotel, restaurant and marina.
Neither the exit off U.S. Route 1 nor any sign when entering Jewfish makes it apparent that the community’s name is “Jewfish.”