Students Abby Roche and Lily Tubbs retrieve the conductivity, temperature, depth sensor package after profiling dissolved oxygen at a station on the Louisiana Universities Marine Consortium Shelfwide Hypoxia Cruise. (Photo by Cassandra Glaspie | LUMCON/LSU)
‘Dead zone’ shrank sharply in 2025
Harlan Kirgan
The Gulf’s “dead zone” has shrunk significantly this summer, with scientists measuring a hypoxic area of just over 4,400 square miles — roughly a third smaller than last year and far less than the long-term average, federal officials announced July 30.
Wednesday, August 13, 2025