There are a few species known as redfish here in the US with Sciaenops ocellatus being the most common:
USA - Micropterus punctulatus - Spottailed bass
USA - Sciaenops ocellatus - Red drum
USA - Sebastes marinus - Ocean perch
USA - Sebastes viviparus - Norway redfish
The Red Drum (Sciaenops ocellatus), also known as Channel Bass, Redfish, Spottail Bass or simply Reds, is a game fish that is found in the Atlantic Ocean from Massachusetts to Florida and in the Gulf of Mexico from Florida to Northern Mexico. It is the only species in the genus Sciaenops.
Characteristics
Red Drum usually occur along coastal waters. Three year-old red drum typically weigh six to eight pounds. The largest one on record weighed just over 94 pounds. When they are large they are called Bull reds, although most people do not find the large ones good to eat.
Mature Red Drum spawn in near shorelines. Juvenile red drum typically inhabit bays and coastal marshes until they reach maturity between 3 and 6 years of age. They will readily accept any bait but prefer Menhaden, Shrimp, Mud Minnows and crabs. Red Drum are relatives of the Black Drum and both make a croaking sound when in trouble.
The most distinguishing mark on the red drum is one large black spot on the upper part of the tail base. Having multiple spots is not uncommon for this fish but having no spots is extremely rare. Scientists believe that the black spot near their tail helps fool predators into attacking the red drum's tail instead of their head, allowing the red drum to escape.