Thousands of dead fish are clogging the Laguna Madre along South Padre Island after a brief but bitter cold snap, turning once-clear shallow flats into a silver carpet and filling the air with a sharp, rotten-egg smell. Residents and business owners are watching nervously as shoreline crews and volunteers skim the water, scoop up carcasses, and haul them to dumpsters while seabirds gorge on the easy meal. Officials say the die-off is concentrated in very shallow flats where fish had no way to reach deeper, slightly warmer water.
What officials are finding
According to CBS News, wildlife experts report that most of the dead fish are striped mullet and that last week’s freezing temperatures are the likely culprit. The outlet notes that many of the fish initially sank to the bay floor, only to rise later as decomposition gases built up inside their bodies, which helped trigger the large-scale cleanup now underway.
Local crews and residents respond
As reported by KRGV, residents along Morningside Drive described seeing “hundreds, thousands of fish” floating in front of their docks and said the smell really kicked in over the weekend. KRGV quoted Texas Parks and Wildlife coastal ecologist Willy Cupit, who pointed to the recent cold snap as the likely cause of the mass mortality, and the city confirmed that shoreline crews are out collecting and disposing of the carcasses. Volunteers have joined the effort, but officials are warning the public not to handle or eat any dead or lethargic fish.
Why the bodies resurface and why mullet matter
Biologists explain that fish that die in shallow water typically sink, then float back up as bacterial decay produces gases that make the carcasses buoyant, a process detailed in scientific reviews of fish die-offs (Neotropical Ichthyology). The Texas Parks and Wildlife Department documented a far larger freeze-related kill in 2021 that wiped out an estimated 3.8 million fish along the Texas coast and led to emergency conservation measures, a reminder of how vulnerable forage species like mullet are. When big numbers of baitfish disappear, the shock can ripple through the bay’s food web and make recovery tougher for sport fisheries and the guides who depend on them.
What to watch and how to stay safe
As the cleanup continues, city and state crews will monitor water quality and track how fish populations respond. The city has warned residents not to collect or eat dead fish in a statement relayed by KRGV. For tourism and fishing businesses, the immediate concern is clearing the mess and easing worries among visitors. Longer-term fallout depends on how quickly forage species and game fish rebound. In the meantime, anglers are being urged to follow posted advisories and give resource managers some room to complete their assessments.
The Texas Parks and Wildlife Department says this event will be folded into its post-freeze monitoring and that temporary rules could be recommended if significant game-fish losses are confirmed, similar to the response after the 2021 freeze. For now, shoreline crews and volunteers will keep working the flats while officials watch to see how fast the Laguna Madre can shake this off and get back to something resembling normal.
