 Annual growth rate for ages 1–3 is 100–150 mm/year-1and then slows to 10–50 mm/year for ages 10–20 .Studies have reported black drum weighing more than 60 kg on the Atlantic coast and they are believed to live up to 60 years.Other studies suggest that black drum in the Gulf of Mexico do not grow as large or live as long; in a sample of 1357 black drum from coastal Louisiana, the largest individual was 22.6 kg and the oldest was 44 years.